The document discusses basic geometric shapes and formulas for calculating their perimeters. It defines a loop or polygon as a shape formed by connecting line segments end to end. Triangles have three sides and their perimeter is calculated as the sum of the three side lengths. Specific types of triangles like equilateral triangles are discussed. Rectangles are four-sided polygons with right angles, and squares are rectangles with four equal sides. Formulas are provided for calculating the perimeters of squares and rectangles based on their side lengths. Some example problems demonstrate applying these concepts and formulas to calculate perimeters of fenced or roped areas composed of multiple shapes.
Help your children to learn about the area and perimeter of shapes with our bumper resource pack. Includes a variety of classroom teaching, display and activity resources to introduce the topic to your children and then extend their knowledge and skills!
Available from http://www.teachingpacks.co.uk/the-area-and-perimeter-pack/
This document discusses geometry concepts related to two-dimensional shapes including perimeter and area. It defines perimeter as the distance around the edge of a shape and area as the space inside a shape. For squares, the perimeter is calculated as 4 times the side length and the area as side length squared. For rectangles, the perimeter is the sum of all sides and the area is width multiplied by height. Examples are provided for calculating perimeters and areas of squares and rectangles.
The document defines and describes basic geometric terms including:
- Points have no size and specify an exact location. Lines intersect at common points.
- Straight lines extend forever in one direction while rays have a starting point and extend in one direction.
- Angles are formed by two rays with a common endpoint called the vertex. Angles are measured in degrees and can be acute, right, obtuse, flat, or full.
- Polygons are closed figures formed by connecting line segments. Regular polygons have equal sides and angles while irregular polygons do not.
Line symmetry is the most common type of symmetry where an object can be folded along a central line so that one half is an exact mirror image of the other. Examples of objects that exhibit line symmetry include many creatures, plants, human faces, bodies, letters of the alphabet, and artworks which can be folded along a central line to form two congruent mirror images. Line symmetry is found throughout nature and in human-made objects.
This document defines key vocabulary terms for triangles and quadrilaterals, including different ways to classify triangles based on side lengths and angle measures. It also defines various types of quadrilaterals such as trapezoids, parallelograms, rectangles, rhombuses, and squares based on their properties. The document provides educational reference information about geometric shapes.
To find the perimeter and area of irregular shapes, the document explains breaking the shape into regular components and calculating their individual perimeters and areas. The perimeter is the distance around a shape found by adding all side lengths. Area is the space within a shape, found by breaking irregular shapes into rectangles, triangles, squares and calculating their individual areas. An example calculates the perimeter as 46 cm and area as 105 sq cm for a shape broken into a rectangle and square.
The document defines key geometric terms including lines, points, line segments, rays, parallel lines, and perpendicular lines. It provides examples of each term and includes diagrams for students to identify whether shapes represent parallel lines, perpendicular lines, or intersecting lines. It also includes diagrams for students to identify as points, lines, line segments, or rays.
This document provides 40 examples of calculating the area and perimeter of different types of triangles, including scalene, acute, obtuse, isosceles, equilateral, right triangles and specific right triangles defined by their angles or side lengths. The examples show calculations with measures expressed as both numbers and variables.
Help your children to learn about the area and perimeter of shapes with our bumper resource pack. Includes a variety of classroom teaching, display and activity resources to introduce the topic to your children and then extend their knowledge and skills!
Available from http://www.teachingpacks.co.uk/the-area-and-perimeter-pack/
This document discusses geometry concepts related to two-dimensional shapes including perimeter and area. It defines perimeter as the distance around the edge of a shape and area as the space inside a shape. For squares, the perimeter is calculated as 4 times the side length and the area as side length squared. For rectangles, the perimeter is the sum of all sides and the area is width multiplied by height. Examples are provided for calculating perimeters and areas of squares and rectangles.
The document defines and describes basic geometric terms including:
- Points have no size and specify an exact location. Lines intersect at common points.
- Straight lines extend forever in one direction while rays have a starting point and extend in one direction.
- Angles are formed by two rays with a common endpoint called the vertex. Angles are measured in degrees and can be acute, right, obtuse, flat, or full.
- Polygons are closed figures formed by connecting line segments. Regular polygons have equal sides and angles while irregular polygons do not.
Line symmetry is the most common type of symmetry where an object can be folded along a central line so that one half is an exact mirror image of the other. Examples of objects that exhibit line symmetry include many creatures, plants, human faces, bodies, letters of the alphabet, and artworks which can be folded along a central line to form two congruent mirror images. Line symmetry is found throughout nature and in human-made objects.
This document defines key vocabulary terms for triangles and quadrilaterals, including different ways to classify triangles based on side lengths and angle measures. It also defines various types of quadrilaterals such as trapezoids, parallelograms, rectangles, rhombuses, and squares based on their properties. The document provides educational reference information about geometric shapes.
To find the perimeter and area of irregular shapes, the document explains breaking the shape into regular components and calculating their individual perimeters and areas. The perimeter is the distance around a shape found by adding all side lengths. Area is the space within a shape, found by breaking irregular shapes into rectangles, triangles, squares and calculating their individual areas. An example calculates the perimeter as 46 cm and area as 105 sq cm for a shape broken into a rectangle and square.
The document defines key geometric terms including lines, points, line segments, rays, parallel lines, and perpendicular lines. It provides examples of each term and includes diagrams for students to identify whether shapes represent parallel lines, perpendicular lines, or intersecting lines. It also includes diagrams for students to identify as points, lines, line segments, or rays.
This document provides 40 examples of calculating the area and perimeter of different types of triangles, including scalene, acute, obtuse, isosceles, equilateral, right triangles and specific right triangles defined by their angles or side lengths. The examples show calculations with measures expressed as both numbers and variables.
This document discusses different types of symmetry, including line symmetry and rotational symmetry. It provides examples of line symmetry in letters of the alphabet and examples of rotational symmetry in shapes like triangles, squares, and pentagons. It also discusses symmetry in architecture, flags, and natural phenomena. Symmetry is a fundamental organizing principle in nature and art that involves preserving certain properties when an object is transformed in some way.
This document defines key geometry vocabulary terms related to lines, angles, and their relationships. It defines points, lines, line segments, midpoints, rays, parallel and perpendicular lines, intersecting lines, bisectors, perpendicular bisectors, and the different types of angles including right, acute, obtuse, straight, reflex, and full angles. It also defines angle terminology like vertex, vertices, complementary angles which sum to 90 degrees, and supplementary angles which sum to 180 degrees.
This document discusses different types of angles including acute, obtuse, right, and straight angles. It defines an angle as being formed by two rays sharing an endpoint called the vertex. Angles are measured in degrees, with acute angles between 0-90 degrees, obtuse angles between 90-180 degrees, right angles equal to 90 degrees, and a straight angle equaling 180 degrees. It includes examples of each type of angle and encourages identifying them in a game.
This document defines and describes different types of plane figures or polygons. It explains that polygons are flat shapes with straight sides that may be regular or irregular. The most common polygons are then defined, including triangles, quadrilaterals, pentagons, hexagons, and octagons. Specific types of each polygon are named and illustrated, such as equilateral, isosceles, and right triangles or rectangle, square, parallelogram, rhombus, and trapezoid quadrilaterals. Their defining attributes like number of sides and angles are provided.
This document discusses geometric shapes, specifically comparing and classifying solid shapes according to their dimensions and properties. It explains that solid shapes are three-dimensional objects that can be described by their width, depth, and height. The key properties of solid shapes discussed are their volume, surface area, and the number of vertices, faces, and edges they have. Specific solid shapes are also discussed like cubes, cones, cuboids, spheres, pyramids and prisms along with their nets.
This document provides instructions for measuring, calculating, and drawing angles using a protractor. It explains that the objectives are to use a protractor to measure and draw acute and obtuse angles to the nearest degree and to calculate angles on a straight line. It emphasizes the importance of properly aligning the protractor by placing the upside down 'T' at the vertex of the angle being measured. Examples are provided of measuring sample angles using the protractor's degree markings.
The document provides information about calculating the areas of different shapes using squares or square units. It includes examples of finding the areas of rectangles, triangles, letters of the alphabet, and irregular shapes by counting whole and half squares. Various area formulas are presented, such as Area = length x breadth. Word problems demonstrate calculating areas of real-world objects like fields, stadiums, and ponds.
This document discusses different types of symmetry found in shapes, letters, numbers, objects, and designs. It provides examples of rotational symmetry, including some letters that have order 2 rotational symmetry like H, I, O, and Z. It also gives examples of shapes, flags, road signs, buildings and monuments that demonstrate various kinds of line and rotational symmetry.
The document defines and provides information about various 3D shapes. It discusses cubes, cuboids, triangular prisms, regular tetrahedrons, spheres, cylinders, cones, square-based pyramids and their key features such as the number of faces, vertices and edges. It also provides information about prisms and nets of 3D shapes.
This document provides information about polygons for 5th and 6th grade math students. It defines what a polygon is, lists different types of polygons based on their number of sides, explains the difference between regular and irregular polygons, and includes activities for students to classify polygons and match them to their definitions. A glossary at the end defines key terms used in the lesson like segment, intersects, vertex, and angle.
This document defines and describes basic geometric terms including lines, line segments, rays, angles, and the relationships between them. It defines a line as extending indefinitely in both directions, a line segment as having two endpoints, a ray as having one endpoint and extending in one direction, and defines right, acute, and obtuse angles. It also describes parallel and perpendicular lines as well as vertices where lines or rays meet to form angles.
The document defines and provides information about common 3D shapes including their key features, number of faces, edges, corners, and planes of symmetry. It discusses the cuboid, cube, prism, triangular prism, hexagonal prism, cylinder, cone, sphere, square-based pyramid, tetrahedron, octahedron, dodecahedron, and icosahedron. For each shape, it specifies characteristics like the type of faces, symmetry properties, and whether they are considered prisms.
Symmetry is found throughout nature and the environment. Many natural phenomena exhibit symmetrical patterns, from snowflakes to plant structures. The underlying mathematical principles of symmetry are reflected in forms found across biology, chemistry, and physics.
This document discusses symmetry and how it relates to shapes. Symmetry refers to when one half of a shape is a mirror image of the other half along a line. The document asks questions about identifying lines of symmetry in different images and determining how many lines of symmetry various shapes possess.
Maths ppt line, line segment, point and ray (1)MahekJais
This document defines and describes different geometric concepts - lines, line segments, points, and rays. It explains that a line extends indefinitely in both directions, a line segment is a part of a line with two endpoints, a point has no dimensions, and a ray extends indefinitely from a single endpoint in one direction. The document includes examples to identify whether diagrams represent rays, lines, points, or line segments.
The document defines and compares different types of quadrilaterals (shapes with four sides):
- Squares and rhombi both have four sides of equal length but squares have four right angles while rhombi have two acute and two obtuse angles.
- Rectangles and parallelograms both have two sets of parallel sides but rectangles have four right angles while parallelograms have two acute and two obtuse angles.
- Trapezoids have two sides that are parallel and two sides that are not parallel.
Geometry is the branch of mathematics concerned with properties of points, lines, angles, curves, surfaces and solids. It involves visualizing shapes, sizes, patterns and positions. The presentation introduced basic concepts like different types of lines, rays and angles. It also discussed plane figures from kindergarten to 8th grade, including classifying shapes by number of sides. Space figures like cubes and pyramids were demonstrated by having students construct 3D models. The concepts of tessellation, symmetry, and line of symmetry were explained.
The document provides instructions on calculating the perimeter and area of different shapes. It defines perimeter as the distance around the outside of a shape and area as the amount of space inside the shape. It explains how to find the perimeter and area of rectangles, irregular shapes, and composite shapes that are made up of other shapes. Formulas for calculating perimeter and area of rectangles are given. Worked examples of calculating perimeter and area for different shapes are provided.
Ci 350 characteristics of geometrical figuresmbruni08
The document defines and describes several basic 3D shapes: the cube, cone, sphere, rectangular solid, pyramid, and cylinder. It provides their key properties such as the number of sides, angles, and dimensions. The document then asks readers to match pictures of common objects to the correct 3D shape and provides the number of students out of 20 who answered each match correctly.
Introduction and Presentation of Geometric Solids PSTTI
The document outlines a Montessori lesson plan for introducing geometric solids to children. It includes aims to develop tactile and visual skills while teaching names of shapes. Exercises are described where children find pairs of solids that fit together and solids that match phases of isolated solids. Real-world examples of the shapes are suggested to reinforce learning. The conclusion states that after this lesson, children will be able to recognize, name, and explore the properties of geometric solids and identify them in their environment.
This document discusses different types of symmetry, including line symmetry and rotational symmetry. It provides examples of line symmetry in letters of the alphabet and examples of rotational symmetry in shapes like triangles, squares, and pentagons. It also discusses symmetry in architecture, flags, and natural phenomena. Symmetry is a fundamental organizing principle in nature and art that involves preserving certain properties when an object is transformed in some way.
This document defines key geometry vocabulary terms related to lines, angles, and their relationships. It defines points, lines, line segments, midpoints, rays, parallel and perpendicular lines, intersecting lines, bisectors, perpendicular bisectors, and the different types of angles including right, acute, obtuse, straight, reflex, and full angles. It also defines angle terminology like vertex, vertices, complementary angles which sum to 90 degrees, and supplementary angles which sum to 180 degrees.
This document discusses different types of angles including acute, obtuse, right, and straight angles. It defines an angle as being formed by two rays sharing an endpoint called the vertex. Angles are measured in degrees, with acute angles between 0-90 degrees, obtuse angles between 90-180 degrees, right angles equal to 90 degrees, and a straight angle equaling 180 degrees. It includes examples of each type of angle and encourages identifying them in a game.
This document defines and describes different types of plane figures or polygons. It explains that polygons are flat shapes with straight sides that may be regular or irregular. The most common polygons are then defined, including triangles, quadrilaterals, pentagons, hexagons, and octagons. Specific types of each polygon are named and illustrated, such as equilateral, isosceles, and right triangles or rectangle, square, parallelogram, rhombus, and trapezoid quadrilaterals. Their defining attributes like number of sides and angles are provided.
This document discusses geometric shapes, specifically comparing and classifying solid shapes according to their dimensions and properties. It explains that solid shapes are three-dimensional objects that can be described by their width, depth, and height. The key properties of solid shapes discussed are their volume, surface area, and the number of vertices, faces, and edges they have. Specific solid shapes are also discussed like cubes, cones, cuboids, spheres, pyramids and prisms along with their nets.
This document provides instructions for measuring, calculating, and drawing angles using a protractor. It explains that the objectives are to use a protractor to measure and draw acute and obtuse angles to the nearest degree and to calculate angles on a straight line. It emphasizes the importance of properly aligning the protractor by placing the upside down 'T' at the vertex of the angle being measured. Examples are provided of measuring sample angles using the protractor's degree markings.
The document provides information about calculating the areas of different shapes using squares or square units. It includes examples of finding the areas of rectangles, triangles, letters of the alphabet, and irregular shapes by counting whole and half squares. Various area formulas are presented, such as Area = length x breadth. Word problems demonstrate calculating areas of real-world objects like fields, stadiums, and ponds.
This document discusses different types of symmetry found in shapes, letters, numbers, objects, and designs. It provides examples of rotational symmetry, including some letters that have order 2 rotational symmetry like H, I, O, and Z. It also gives examples of shapes, flags, road signs, buildings and monuments that demonstrate various kinds of line and rotational symmetry.
The document defines and provides information about various 3D shapes. It discusses cubes, cuboids, triangular prisms, regular tetrahedrons, spheres, cylinders, cones, square-based pyramids and their key features such as the number of faces, vertices and edges. It also provides information about prisms and nets of 3D shapes.
This document provides information about polygons for 5th and 6th grade math students. It defines what a polygon is, lists different types of polygons based on their number of sides, explains the difference between regular and irregular polygons, and includes activities for students to classify polygons and match them to their definitions. A glossary at the end defines key terms used in the lesson like segment, intersects, vertex, and angle.
This document defines and describes basic geometric terms including lines, line segments, rays, angles, and the relationships between them. It defines a line as extending indefinitely in both directions, a line segment as having two endpoints, a ray as having one endpoint and extending in one direction, and defines right, acute, and obtuse angles. It also describes parallel and perpendicular lines as well as vertices where lines or rays meet to form angles.
The document defines and provides information about common 3D shapes including their key features, number of faces, edges, corners, and planes of symmetry. It discusses the cuboid, cube, prism, triangular prism, hexagonal prism, cylinder, cone, sphere, square-based pyramid, tetrahedron, octahedron, dodecahedron, and icosahedron. For each shape, it specifies characteristics like the type of faces, symmetry properties, and whether they are considered prisms.
Symmetry is found throughout nature and the environment. Many natural phenomena exhibit symmetrical patterns, from snowflakes to plant structures. The underlying mathematical principles of symmetry are reflected in forms found across biology, chemistry, and physics.
This document discusses symmetry and how it relates to shapes. Symmetry refers to when one half of a shape is a mirror image of the other half along a line. The document asks questions about identifying lines of symmetry in different images and determining how many lines of symmetry various shapes possess.
Maths ppt line, line segment, point and ray (1)MahekJais
This document defines and describes different geometric concepts - lines, line segments, points, and rays. It explains that a line extends indefinitely in both directions, a line segment is a part of a line with two endpoints, a point has no dimensions, and a ray extends indefinitely from a single endpoint in one direction. The document includes examples to identify whether diagrams represent rays, lines, points, or line segments.
The document defines and compares different types of quadrilaterals (shapes with four sides):
- Squares and rhombi both have four sides of equal length but squares have four right angles while rhombi have two acute and two obtuse angles.
- Rectangles and parallelograms both have two sets of parallel sides but rectangles have four right angles while parallelograms have two acute and two obtuse angles.
- Trapezoids have two sides that are parallel and two sides that are not parallel.
Geometry is the branch of mathematics concerned with properties of points, lines, angles, curves, surfaces and solids. It involves visualizing shapes, sizes, patterns and positions. The presentation introduced basic concepts like different types of lines, rays and angles. It also discussed plane figures from kindergarten to 8th grade, including classifying shapes by number of sides. Space figures like cubes and pyramids were demonstrated by having students construct 3D models. The concepts of tessellation, symmetry, and line of symmetry were explained.
The document provides instructions on calculating the perimeter and area of different shapes. It defines perimeter as the distance around the outside of a shape and area as the amount of space inside the shape. It explains how to find the perimeter and area of rectangles, irregular shapes, and composite shapes that are made up of other shapes. Formulas for calculating perimeter and area of rectangles are given. Worked examples of calculating perimeter and area for different shapes are provided.
Ci 350 characteristics of geometrical figuresmbruni08
The document defines and describes several basic 3D shapes: the cube, cone, sphere, rectangular solid, pyramid, and cylinder. It provides their key properties such as the number of sides, angles, and dimensions. The document then asks readers to match pictures of common objects to the correct 3D shape and provides the number of students out of 20 who answered each match correctly.
Introduction and Presentation of Geometric Solids PSTTI
The document outlines a Montessori lesson plan for introducing geometric solids to children. It includes aims to develop tactile and visual skills while teaching names of shapes. Exercises are described where children find pairs of solids that fit together and solids that match phases of isolated solids. Real-world examples of the shapes are suggested to reinforce learning. The conclusion states that after this lesson, children will be able to recognize, name, and explore the properties of geometric solids and identify them in their environment.
Commly used shapes and designs for powerpointPushkar Kumar
These are some of the commonly used shapes and formats in a professionally designed powerpoint slide. Use them to make your presentation more impactful and give it the professional touch. Want to download - email me
-- Update: Followed by soo many requests, you can now download the file as well
This presentation is one of the best presentations from our study material for our weekly workshops which ADMEC conducts every week at the center. This presentation contains very good information for “Use of Shapes in Graphic Design”.
The document discusses various geometry concepts including angles, polygons, triangles, quadrilaterals, parallel lines, area, and volume. It defines types of angles and angle relationships formed by parallel lines. It also defines properties of triangles, quadrilaterals like parallelograms, trapezoids, and polygons. It provides formulas to calculate the area of various shapes and the circumference and volume of circles.
The document discusses using GeoGebra to construct and investigate the properties of various geometric figures. Students will work in pairs using GeoGebra to construct shapes like rectangles, squares, triangles, parallelograms, and rhombuses. They will explore the defining properties of each figure and use a "drag test" to determine if their construction is accurate or just a drawing. The goal is for students to better understand geometric shapes and constructions through an interactive activity using dynamic geometry software.
The document provides examples of various geometric shapes found in architecture around the world and defines each shape. It begins by using the Capital Building to represent a point and the Empire State Building to represent a line segment. It then discusses planes, angles, perpendicular and parallel lines using various buildings as examples. The summary concludes with triangles, right triangles, polygons up to hexagons, and three-dimensional shapes including cubes, cylinders, spheres, and polyhedrons being represented by different architectural structures.
The document provides a template for creating a sales plan in 4 sections. Section 1 outlines revenue targets and key performance indicators. Section 2 describes processes for managing suspects, prospects, clients, and opportunities. Section 3 explains how to measure sales activity, processes, team performance, and profits. Section 4 involves analyzing the results and adjusting the plan regularly to ensure targets are met. The template is intended to help organizations formalize their selling strategies through a comprehensive yet easy-to-follow sales plan.
The document discusses how to draw and calculate percentages for a pie chart. It provides an example of survey data about which day students would paint scenery for a school play. The data is used to calculate the angles for each sector of the pie chart based on the total of 360 degrees. Students are then asked to draw the pie chart, include a key, and calculate the percentage for each sector. Peer assessment is also discussed to check work for points and stars.
The document outlines a 7-step process for sales planning: 1) Define a promotional calendar, 2) Analyze past sales records, 3) Project initial sales, 4) Project revenues and expenses to determine results, 5) Adjust projections to achieve desired results, 6) Detail the plan by section, store, day based on history and campaigns, 7) Continuously monitor and adjust the plan based on sales. The process aims to align campaigns with company strategy and forecast sales and expenses to ensure planned results are achieved.
Ever see great presentations on this site and wonder "How can I make slides like those?"
This quick, insight-packed course will distill many of the major lessons I've learned designing presentations (20 or so of which have been featured on the Slideshare homepage for clients like Honigman Media and Group 8A) over the past half decade.
The major areas of discussion include
STORYTELLING | RHETORIC | DESIGN
Each of these are rigorously examined using easy to understand examples and practical, actionable takeaways.
Click through these slides and come out the other side a better presentation designer, guaranteed!
I currently teach Digital Marketing at General Assembly and have given this lecture to nearly unanimous positive feedback.
If you'd like to get access to this PDF or pick my brain about presentation design, marketing, etc... shoot me a line!
EMAIL: Jig813@gmail.com
TWITTER: twitter.com/JoeandTell
LINKEDIN: linkedin.com/in/josephgelman
We held the largest ever Virtual SlideShare Summit a week back, if you missed it here's your chance to hear from the experts once more on some of the takeaways on presentation design and SlideShare Marketing
Classify three-dimensional figures according to their properties.
Use nets and cross sections to analyze three-dimensional figures.
Extend midpoint and distance formulas to three dimensions
This document discusses mensuration and defines perimeter and area of closed figures. It provides examples of calculating the perimeter of rectangles, squares, equilateral triangles, and other shapes. It also defines area as the amount of surface enclosed by a closed figure and provides examples of calculating the area of rectangles and squares by counting the number of squares covered on a grid. The key learning objectives are to interpret the perimeter of closed figures and illustrate the area of closed figures.
The document defines various polygons based on their number of sides and interior angles. It also defines types of triangles based on their angles and sides. It provides formulas for finding missing angles of triangles and quadrilaterals. Additionally, it defines complementary, supplementary and trigonometric ratios. It concludes by explaining how to calculate the areas of various shapes including squares, rectangles, parallelograms, trapezoids and triangles. It also provides formulas for finding perimeters, circumferences, surface areas and volumes of various 3D shapes like cubes, prisms, cylinders, pyramids, cones, spheres.
This document defines and provides examples of different geometric shapes and how to calculate their areas. It discusses circles, including calculating area using the radius. It also covers polygons like triangles, quadrilaterals, and regular polygons. Formulas are provided for calculating the areas of circles, triangles, parallelograms, trapezoids, and finding missing side lengths using the Pythagorean theorem. Examples of applying these formulas to solve for areas and side lengths are also included.
Geometry is the study of points, lines, angles, surfaces, and solids. It includes basic terms like points, lines, line segments, rays, planes, and angles. Key concepts are defined such as parallel and intersecting lines, acute, obtuse, right, complementary and supplementary angles. The document also covers perimeter, area of squares, rectangles, triangles and circles. It introduces volume and surface area, and defines common 3D shapes like cubes, cylinders and spheres, providing formulas to calculate their volume and surface area.
This document provides information about polygons, including defining polygons, recognizing different types of polygons, naming polygons based on the number of sides, and determining key properties such as the number of sides, vertices, and diagonals. It also discusses sketching polygons, identifying lines of symmetry, and the geometric properties of specific polygons like triangles and quadrilaterals. Examples are provided for drawing triangles and quadrilaterals given specific measurements. Key terms are defined in a glossary at the end.
The document discusses different types of three-dimensional shapes studied in solid geometry. It provides definitions and examples of cubes, rectangular prisms, cylinders, spheres, cones, and pyramids. It also gives the formulas for calculating the volume and surface area of these shapes. For each shape, it provides examples of applying the formulas to solve volume and surface area problems.
This module discusses geometry concepts related to shape and size, including perimeter and circumference formulas. It will cover calculating the perimeter of common polygons like triangles, quadrilaterals, and polygons with more than 4 sides. It will also cover circumference formulas for circles. Students will learn to define basic geometric terms, state relevant formulas, and apply these concepts to solve real-world problems involving perimeter and circumference. The module contains sample problems and multi-step word problems for students to practice these skills.
Triangles What are the properties of an Isosceles Triangle.pdfChloe Cheney
The document defines and describes properties of isosceles triangles. It begins by classifying triangles into three types based on side lengths: equilateral, scalene, and isosceles. It then discusses properties specific to isosceles triangles, including that they have two equal sides or legs and an unequal base, and angles opposite the equal sides are also equal. Several formulas are provided for calculating properties of isosceles triangles like area, perimeter, and altitude. Examples of isosceles triangles in real life and practice problems with solutions are also included.
CLASS IX MATHS 6 areas of parallelogram and trianglesRc Os
The document discusses relationships between the areas of plane figures such as parallelograms, triangles, and rectangles that share the same base or lie between the same parallels. It defines what it means for figures to be on the same base and between the same parallels. The key points are that parallelograms on the same base and between the same parallels have equal areas, and triangles on the same base and between the same parallels also have equal areas. Formulas for calculating the areas of parallelograms and triangles are reviewed.
This document presents information about various geometric shapes and formulas for calculating dimensions such as perimeter, area, surface area, and volume. It defines length, width, and height. Formulas are provided for calculating the perimeter and area of rectangles, squares, triangles, parallelograms, trapezoids, and circles. Surface area and volume formulas are given for cubes, cuboids, cylinders, cones, spheres, and other three-dimensional shapes.
This document discusses calculating the perimeter and area of rectangles, squares, and composite figures. It provides formulas for finding the perimeter and area of rectangles and squares, such as the perimeter of a rectangle being the sum of its four sides and the area being length x width. Examples are given of calculating perimeters and areas of various shapes. The document also discusses how to break down composite figures into simpler shapes to find their perimeters and areas.
This document provides information about circle theorems developed by Euclid of Alexandria. It begins with introductory terminology for parts of a circle such as diameter, radius, circumference. It then presents 8 theorems with examples and explanations: 1) The angle in a semi-circle is a right angle, 2) The angle subtended at the centre is twice the angle at the circumference, 3) Angles subtended by an arc or chord in the same segment are equal, 4) The angle between a tangent and radius is 90 degrees, 5) The alternate segment theorem relating angles of tangents and chords, 6) The cyclic quadrilateral theorem stating opposite angles sum to 180 degrees, 7) The two tangent
Triangles What are the properties of an Isosceles Triangle.pdfChloe Cheney
Learn how types and angles of triangles differ. Discover what an isosceles triangle is and its properties with example questions through our blogs and private math tutor.
1) The document discusses constructing the quadrilateral with the maximum area given the lengths of its four sides.
2) It presents methods for determining the radius of the enclosing circle, the angles between sides, and the relationship between these angles and the side lengths.
3) The key results are relationships that allow constructing the maximum-area quadrilateral in a circle by drawing radii and the angles between them based on the given side lengths.
This document discusses polygons and their classifications. It begins by defining what a polygon is - a closed plane figure formed by connecting three or more line segments at their endpoints. It then discusses different types of polygons including regular vs irregular, convex vs concave, simple vs complex, and names polygons based on the number of sides. Specific polygon types like triangles, quadrilaterals, and properties such as interior angles, area, and perimeter are also covered. Formulas to calculate area, sum of interior angles, and measure of central angle are provided.
The document discusses constructing the quadrilateral with the maximum area given the lengths of its four sides. It presents five key results:
1) The relationship between angles and sides of the quadrilateral when constructed in a circle with the angle between two adjacent sides.
2) The relationship among the radius of the circle, the angle, and the lengths of sides close to the angle.
3) The relationship between the angle at the center of the circle and the length of sides and radius.
4) How to construct the maximum area quadrilateral by drawing the sides in a circle based on calculated radii and angles.
5) The relationship between the angle at the center of the circle and the angles in the quadrilateral.
This document provides information about triangles, squares, and trigonometry. It begins by defining different types of triangles, including isosceles, equilateral, and scalene triangles. It then discusses squares and using the area formula. The document introduces Pythagoras' theorem and provides examples of using it to find missing side lengths in right triangles. It also covers sine, cosine, and tangent ratios. Exercises provide practice applying concepts like finding missing lengths, areas, and using trigonometric functions in right triangles.
The document provides information on geometry topics including angles, distance, area, and volume. It defines key concepts such as perpendicular lines, parallel lines, interior and exterior angles, circumference, arc length, perimeter, area of triangles, circles, quadrilaterals, and strategies for finding areas of irregular shapes. Examples are provided to illustrate formulas and problem-solving approaches for finding distances, midpoints, areas, and perimeters in various geometric figures.
1) The document discusses different ways to determine if two triangles are equal based on their side lengths and angles.
2) It establishes three general principles: if two triangles have (a) equal sides, (b) two equal sides and the angle between them, or (c) one equal side and equal angles at the ends, then their other properties (sides or angles) are also equal.
3) Examples are given to illustrate each principle and exceptions are noted where equality does not imply full equality.
Similar to 51 basic geometrical shapes and formulas (20)
This document contains a sample algebra test with 24 multiple choice questions and solutions. Each question is followed by an answer option and a link to the solution. The solutions provide step-by-step workings to arrive at the correct answer. The test covers topics such as fractions, operations with fractions, percentages, word problems involving percentages, and solving simple equations. An interactive PowerPoint file is also included but viewing the slides is not interactive when using Slideshare.
The rectangular coordinate system represents points in a plane using perpendicular axes (x-axis and y-axis) that intersect at the origin (0,0). Each point is assigned an ordered pair (x,y) where x is the distance from the origin on the x-axis and y is the distance from the origin on the y-axis. The system divides the plane into four quadrants based on whether the x and y values are positive or negative. The rectangular coordinate system allows any point in the plane to be uniquely addressed using its x and y coordinates.
The document describes the number line and how it assigns numbers to points on a line. It explains that 0 is assigned to the center or origin of the line. Positive numbers are assigned to the right of 0 and negative numbers to the left. Any number to the right of another number on the number line is defined as greater than the number to its left. Intervals on the number line, denoted by a < x < b, represent all the numbers between a and b. Examples are provided to illustrate drawing intervals on the number line.
The document discusses right triangles and the Pythagorean theorem. It defines a right triangle as one with a 90-degree angle, and labels the sides as the hypotenuse (the side opposite the right angle) and the two legs. It presents the Pythagorean theorem, which states that for any right triangle, the sum of the squares of the two legs equals the square of the hypotenuse. The document provides an example of using the theorem to calculate the height of a wall given the length of a leaning ladder. It also defines the square root and how it relates to finding the length of a side of a triangle based on the Pythagorean theorem.
The document discusses ratios, proportions, and how to solve proportional equations. It defines a ratio as two related quantities stated side by side, and gives the example of a 3:4 ratio of eggs to flour in a recipe. Proportions are defined as equal ratios. The key steps to solve proportional equations are: 1) write the ratios as fractions set equal to each other, 2) use cross-multiplication to convert the proportions into regular equations, and 3) solve the resulting equation using algebraic techniques. An example problem demonstrates these steps to solve a proportional equation for the variable x.
The document discusses exponents and rules for working with them. It defines exponents as the number of times a base is used as a factor in a repetitive multiplication. The main rules covered are:
- The multiply-add rule, which states that ANAK = AN+K
- The divide-subtract rule, which states that AN/AK = AN-K
Examples are provided to demonstrate calculating exponents and applying the rules.
The document discusses solving linear equations using examples of ordering pizzas. It explains that a linear equation contains linear expressions on both sides, such as 3x + 10 = 34, and can be solved by manipulating the equation through steps like subtraction to find the value of x that makes both sides equal. For example, in the equation 3x + 10 = 34, subtracting 10 from both sides and dividing both sides by 3 reveals that x = 8 is the solution.
The document discusses mathematical expressions and how to combine them. It defines an expression as a calculation procedure written with numbers, variables, and operations. Expressions have terms, with the x-term being the variable term and the number term being the constant. To combine expressions, like terms are combined in the same way numbers are, while unlike terms cannot be combined. The simplest expressions are linear expressions of the form ax + b.
34 conversion between decimals, fractions and percentagesalg-ready-review
The document discusses the conversion between decimals, fractions, and percentages. It states that fractions, decimals, and percentages are different ways to express quantities. Fractions provide instructions to divide a whole into parts, while decimals standardize fractions to powers of 10 to make addition and subtraction easier. Percentages express a quantity as a ratio out of 100. The document then provides examples and steps for converting between these representations.
The document defines percentages as expressing "how many out of 100" and can be written as a fraction with the percentage symbol or as a decimal. It provides examples of common percentages like 1% = 1/100, 5% = 1/20, 10% = 1/10, 25% = 1/4, and 50% = 1/2. The document also works through examples of calculating percentages of a total amount, like finding 3/4 of $100 is $75, or that 45% of 60 pieces of candy is 27 pieces. Finally, it lists some important percentages that relate to coins: 5% = 1/20 for nickels, 10% = 1/10 for dimes, and 25%
The document discusses how to multiply multi-digit decimal numbers. It explains that multiplication of multi-digit numbers is done by multiplying the digits in place value, starting from the ones place. The results are recorded and carried over as needed. It provides a step-by-step example of 47 x 6, showing how each digit is multiplied and the results carried to the next place value. It notes that the same process is followed for decimals, but the decimal point is placed in the final product so that the total number of decimal places is correct.
31 decimals, addition and subtraction of decimalsalg-ready-review
This document introduces decimals by using an analogy of a cash register holding coins of various values. It explains that decimals allow tracking of smaller quantities by including base-10 fractions in the number system. It assumes the US Treasury makes fictional smaller value coins like "itties" and "bitties", then demonstrates writing decimal numbers as representations of coins in different slots of a cash register. Finally, it provides steps for comparing decimal values by lining up numbers at the decimal point and determining the largest by the digits from left to right.
The document discusses variables, expressions, and evaluation in mathematics. It explains that variables like x, y, and z are used to represent numbers, and their values can change depending on the situation. Expressions are made using variables and mathematical operations, and evaluation involves replacing the variables in an expression with input values and calculating the output. The input values replace the variables within parentheses, and the process of evaluation finds the output. Several examples are provided to demonstrate evaluating different expressions by replacing variables with given input values.
The document discusses order of operations and how to correctly evaluate mathematical expressions. It provides examples of evaluating expressions involving multiplication, division, addition, subtraction, grouping symbols and exponents. The key steps are to perform operations within grouping symbols from the innermost out, then multiplication and division from left to right, followed by addition and subtraction from left to right. Setting clear rules for order of operations ensures the correct solution is obtained.
23 multiplication and division of signed numbersalg-ready-review
The document discusses rules for multiplying signed numbers. It states that to multiply two signed numbers, multiply their absolute values and use the following rules for the sign of the product: two numbers with the same sign yield a positive product; two numbers with opposite signs yield a negative product. It also discusses how multiplication is implied in algebra without an explicit operation symbol between terms.
The document discusses the Pythagorean theorem and square roots. It defines a right triangle as having one 90 degree angle. The Pythagorean theorem states that for a right triangle with sides a, b, c, where c is the hypotenuse opposite the right angle, a^2 + b^2 = c^2. An example uses the theorem to calculate the height of a wall given the length of a ladder leaning against it. Square roots are then introduced, with the square root of a number x defined as the positive number that produces x when squared.
The document discusses the procedure of cross multiplication. It explains that cross multiplication can be used to rewrite ratios involving fractions as ratios of whole numbers. This is done by writing the fractions as ratios, then multiplying the denominators diagonally to obtain two new numbers. The ratio between these new numbers represents the original fractional ratio using whole numbers. An example demonstrates taking a ratio of 3/4 cups sugar to 2/3 cups flour and rewriting it as 9:8 cups sugar to flour using cross multiplication. The document also notes cross multiplication can be used to compare two fractions, with the larger product corresponding to the larger fraction.
The document discusses finding the least common multiple (LCM) of numbers. It defines the LCM as the smallest number that is a multiple of all the given numbers. It provides examples of finding the LCM by listing multiples and by constructing it from prime factorizations. The preferred method when the LCM is large is to construct it by fully factorizing each number into prime factors and taking the highest power of each prime factor.
The document discusses rules for multiplying fractions. It states that to multiply fractions, one should multiply the numerators and multiply the denominators, canceling terms when possible. It then provides examples, such as multiplying 12/25 * 15/8, simplifying to 9/10. It also notes that word problems involving fractions of a quantity can often be solved by translating them into fraction multiplications.
The document defines fractions as numbers of the form p/q where p and q are whole numbers not equal to 0. Fractions represent parts of a whole, for example 3/6 of a pizza. The top number is the numerator and represents the number of parts, while the bottom number is the denominator and represents the total number of equal parts the whole was divided into. Calculations with fractions involve dividing the whole into the number of parts in the denominator and taking the number of parts indicated by the numerator. Whole numbers can be viewed as having a denominator of 1. Dividing by 0 is undefined in mathematics.
This document provides an overview of wound healing, its functions, stages, mechanisms, factors affecting it, and complications.
A wound is a break in the integrity of the skin or tissues, which may be associated with disruption of the structure and function.
Healing is the body’s response to injury in an attempt to restore normal structure and functions.
Healing can occur in two ways: Regeneration and Repair
There are 4 phases of wound healing: hemostasis, inflammation, proliferation, and remodeling. This document also describes the mechanism of wound healing. Factors that affect healing include infection, uncontrolled diabetes, poor nutrition, age, anemia, the presence of foreign bodies, etc.
Complications of wound healing like infection, hyperpigmentation of scar, contractures, and keloid formation.
Gender and Mental Health - Counselling and Family Therapy Applications and In...PsychoTech Services
A proprietary approach developed by bringing together the best of learning theories from Psychology, design principles from the world of visualization, and pedagogical methods from over a decade of training experience, that enables you to: Learn better, faster!
Leveraging Generative AI to Drive Nonprofit InnovationTechSoup
In this webinar, participants learned how to utilize Generative AI to streamline operations and elevate member engagement. Amazon Web Service experts provided a customer specific use cases and dived into low/no-code tools that are quick and easy to deploy through Amazon Web Service (AWS.)
Philippine Edukasyong Pantahanan at Pangkabuhayan (EPP) CurriculumMJDuyan
(𝐓𝐋𝐄 𝟏𝟎𝟎) (𝐋𝐞𝐬𝐬𝐨𝐧 𝟏)-𝐏𝐫𝐞𝐥𝐢𝐦𝐬
𝐃𝐢𝐬𝐜𝐮𝐬𝐬 𝐭𝐡𝐞 𝐄𝐏𝐏 𝐂𝐮𝐫𝐫𝐢𝐜𝐮𝐥𝐮𝐦 𝐢𝐧 𝐭𝐡𝐞 𝐏𝐡𝐢𝐥𝐢𝐩𝐩𝐢𝐧𝐞𝐬:
- Understand the goals and objectives of the Edukasyong Pantahanan at Pangkabuhayan (EPP) curriculum, recognizing its importance in fostering practical life skills and values among students. Students will also be able to identify the key components and subjects covered, such as agriculture, home economics, industrial arts, and information and communication technology.
𝐄𝐱𝐩𝐥𝐚𝐢𝐧 𝐭𝐡𝐞 𝐍𝐚𝐭𝐮𝐫𝐞 𝐚𝐧𝐝 𝐒𝐜𝐨𝐩𝐞 𝐨𝐟 𝐚𝐧 𝐄𝐧𝐭𝐫𝐞𝐩𝐫𝐞𝐧𝐞𝐮𝐫:
-Define entrepreneurship, distinguishing it from general business activities by emphasizing its focus on innovation, risk-taking, and value creation. Students will describe the characteristics and traits of successful entrepreneurs, including their roles and responsibilities, and discuss the broader economic and social impacts of entrepreneurial activities on both local and global scales.
A Visual Guide to 1 Samuel | A Tale of Two HeartsSteve Thomason
These slides walk through the story of 1 Samuel. Samuel is the last judge of Israel. The people reject God and want a king. Saul is anointed as the first king, but he is not a good king. David, the shepherd boy is anointed and Saul is envious of him. David shows honor while Saul continues to self destruct.
2. If we connect the two
ends of a rope that’s
resting flat in a plane,
we obtain a loop.
Basic Geometrical Shapes and Formulas
3. If we connect the two
ends of a rope that’s
resting flat in a plane,
we obtain a loop.
Basic Geometrical Shapes and Formulas
4. If we connect the two
ends of a rope that’s
resting flat in a plane,
we obtain a loop.
Basic Geometrical Shapes and Formulas
5. If we connect the two
ends of a rope that’s
resting flat in a plane,
we obtain a loop.
Basic Geometrical Shapes and Formulas
6. If we connect the two
ends of a rope that’s
resting flat in a plane,
we obtain a loop.
The loop forms a
perimeter or border
that encloses a flat area, or a plane-shape.
Basic Geometrical Shapes and Formulas
7. If we connect the two
ends of a rope that’s
resting flat in a plane,
we obtain a loop.
The loop forms a
perimeter or border
that encloses a flat area, or a plane-shape.
The length of the border, i.e. the length of the rope,
is also referred to as the perimeter of the area.
Basic Geometrical Shapes and Formulas
8. If we connect the two
ends of a rope that’s
resting flat in a plane,
we obtain a loop.
The loop forms a
perimeter or border
that encloses a flat area, or a plane-shape.
The length of the border, i.e. the length of the rope,
is also referred to as the perimeter of the area.
All the areas above are enclosed by the same rope,
so they have equal perimeters.
Basic Geometrical Shapes and Formulas
9. If we connect the two
ends of a rope that’s
resting flat in a plane,
we obtain a loop.
The loop forms a
perimeter or border
that encloses a flat area, or a plane-shape.
The length of the border, i.e. the length of the rope,
is also referred to as the perimeter of the area.
All the areas above are enclosed by the same rope,
so they have equal perimeters.
Following shapes are polygons:
A plane-shape is a polygon if it is formed by straight lines.
Basic Geometrical Shapes and Formulas
10. If we connect the two
ends of a rope that’s
resting flat in a plane,
we obtain a loop.
The loop forms a
perimeter or border
that encloses a flat area, or a plane-shape.
The length of the border, i.e. the length of the rope,
is also referred to as the perimeter of the area.
All the areas above are enclosed by the same rope,
so they have equal perimeters.
Following shapes are polygons: These are not polygons:
A plane-shape is a polygon if it is formed by straight lines.
Basic Geometrical Shapes and Formulas
12. Three sided polygons
are triangles.
Basic Geometrical Shapes and Formulas
If the sides of a triangle are labeled as
a, b, and c, then the perimeter is
P = a + b + c.
a
b
c
13. Triangles with three equal sides are
equilateral triangles.
Three sided polygons
are triangles.
Basic Geometrical Shapes and Formulas
If the sides of a triangle are labeled as
a, b, and c, then the perimeter is
P = a + b + c.
a
b
c
14. Triangles with three equal sides are
equilateral triangles.
Three sided polygons
are triangles.
Basic Geometrical Shapes and Formulas
If the sides of a triangle are labeled as
a, b, and c, then the perimeter is
P = a + b + c.
a
b
c
The perimeter of an equilateral triangle is P = 3s.
15. Triangles with three equal sides are
equilateral triangles.
Three sided polygons
are triangles.
Basic Geometrical Shapes and Formulas
If the sides of a triangle are labeled as
a, b, and c, then the perimeter is
P = a + b + c.
a
b
c
The perimeter of an equilateral triangle is P = 3s.
Rectangles are 4-sided
polygons where the sides
are joint at a right angle as
shown.
16. Triangles with three equal sides are
equilateral triangles.
Three sided polygons
are triangles.
Basic Geometrical Shapes and Formulas
If the sides of a triangle are labeled as
a, b, and c, then the perimeter is
P = a + b + c.
a
b
c
The perimeter of an equilateral triangle is P = 3s.
Rectangles are 4-sided
polygons where the sides
are joint at a right angle as
shown. s
s
ss
A square
Rectangle with four equal sides are squares.
17. Triangles with three equal sides are
equilateral triangles.
Three sided polygons
are triangles.
Basic Geometrical Shapes and Formulas
If the sides of a triangle are labeled as
a, b, and c, then the perimeter is
P = a + b + c.
a
b
c
The perimeter of an equilateral triangle is P = 3s.
Rectangles are 4-sided
polygons where the sides
are joint at a right angle as
shown. s
s
ss
A square
Rectangle with four equal sides are squares.
The perimeter of a squares is
P = s + s + s + s = 4s
18. Basic Geometrical Shapes and Formulas
Example A. We have to fence in an area with two squares
and an equilateral triangle as shown.
How many feet of fences
do we need?
20 ft
19. Basic Geometrical Shapes and Formulas
Example A. We have to fence in an area with two squares
and an equilateral triangle as shown.
How many feet of fences
do we need?
20 ft
The area consists of two squares and an equilateral triangle
so all the sides, measured from corner to corner, are equal.
20. Basic Geometrical Shapes and Formulas
Example A. We have to fence in an area with two squares
and an equilateral triangle as shown.
How many feet of fences
do we need?
20 ft
The area consists of two squares and an equilateral triangle
so all the sides, measured from corner to corner, are equal.
There are 9 sections where each is 20 ft hence we need
9 x 20 = 180 ft of fence.
21. Basic Geometrical Shapes and Formulas
Example A. We have to fence in an area with two squares
and an equilateral triangle as shown.
How many feet of fences
do we need?
20 ft
The area consists of two squares and an equilateral triangle
so all the sides, measured from corner to corner, are equal.
There are 9 sections where each is 20 ft hence we need
9 x 20 = 180 ft of fence.
If we know two adjacent sides of a rectangle, then we know
all four sides because their opposites sides are identical.
22. Basic Geometrical Shapes and Formulas
Example A. We have to fence in an area with two squares
and an equilateral triangle as shown.
How many feet of fences
do we need?
20 ft
The area consists of two squares and an equilateral triangle
so all the sides, measured from corner to corner, are equal.
There are 9 sections where each is 20 ft hence we need
9 x 20 = 180 ft of fence.
If we know two adjacent sides of a rectangle, then we know
all four sides because their opposites sides are identical.
We will use the word “height” for
the vertical side and “width” for the
horizontal side.
width (w)
height (h)
23. Basic Geometrical Shapes and Formulas
Example A. We have to fence in an area with two squares
and an equilateral triangle as shown.
How many feet of fences
do we need?
20 ft
The area consists of two squares and an equilateral triangle
so all the sides, measured from corner to corner, are equal.
There are 9 sections where each is 20 ft hence we need
9 x 20 = 180 ft of fence.
If we know two adjacent sides of a rectangle, then we know
all four sides because their opposites sides are identical.
We will use the word “height” for
the vertical side and “width” for the
horizontal side. The perimeter of a
rectangle is h + h + w + w or that
width (w)
height (h)
P = 2h + 2w
24. Example B. a. We want to rope off a 50-meter by 70-meter
rectangular area and also rope off sections of area as shown.
How many meters of rope do we need?
Basic Geometrical Shapes and Formulas
50 m
70 m
25. Example B. a. We want to rope off a 50-meter by 70-meter
rectangular area and also rope off sections of area as shown.
How many meters of rope do we need?
Basic Geometrical Shapes and Formulas
50 m
70 m
We have three heights where each
requires 50 meters of rope,
26. Example B. a. We want to rope off a 50-meter by 70-meter
rectangular area and also rope off sections of area as shown.
How many meters of rope do we need?
Basic Geometrical Shapes and Formulas
and three widths where each
requires 70 meters of rope.
50 m
70 m
We have three heights where each
requires 50 meters of rope,
27. Example B. a. We want to rope off a 50-meter by 70-meter
rectangular area and also rope off sections of area as shown.
How many meters of rope do we need?
Basic Geometrical Shapes and Formulas
and three widths where each
requires 70 meters of rope.
Hence it requires
3(50) + 3(70) = 150 + 210 = 360 meters of rope.
50 m
70 m
We have three heights where each
requires 50 meters of rope,
28. Example B. a. We want to rope off a 50-meter by 70-meter
rectangular area and also rope off sections of area as shown.
How many meters of rope do we need?
Basic Geometrical Shapes and Formulas
and three widths where each
requires 70 meters of rope.
Hence it requires
3(50) + 3(70) = 150 + 210 = 360 meters of rope.
50 m
70 m
We have three heights where each
requires 50 meters of rope,
b. What is the perimeter of the following step-shape
if all the short segments are 2 feet?
2 ft
The perimeter of the step-shape is the
same as the perimeter of the rectangle
that boxes it in as shown.
29. Example B. a. We want to rope off a 50-meter by 70-meter
rectangular area and also rope off sections of area as shown.
How many meters of rope do we need?
Basic Geometrical Shapes and Formulas
and three widths where each
requires 70 meters of rope.
Hence it requires
3(50) + 3(70) = 150 + 210 = 360 meters of rope.
50 m
70 m
We have three heights where each
requires 50 meters of rope,
b. What is the perimeter of the following step-shape
if all the short segments are 2 feet?
2 ft
30. Example B. a. We want to rope off a 50-meter by 70-meter
rectangular area and also rope off sections of area as shown.
How many meters of rope do we need?
Basic Geometrical Shapes and Formulas
and three widths where each
requires 70 meters of rope.
Hence it requires
3(50) + 3(70) = 150 + 210 = 360 meters of rope.
50 m
70 m
We have three heights where each
requires 50 meters of rope,
b. What is the perimeter of the following step-shape
if all the short segments are 2 feet?
2 ft
The perimeter of the step-shape is the
same as the perimeter of the rectangle
that boxes it in as shown.
2 ft
31. Example B. a. We want to rope off a 50-meter by 70-meter
rectangular area and also rope off sections of area as shown.
How many meters of rope do we need?
Basic Geometrical Shapes and Formulas
and three widths where each
requires 70 meters of rope.
Hence it requires
3(50) + 3(70) = 150 + 210 = 360 meters of rope.
50 m
70 m
We have three heights where each
requires 50 meters of rope,
b. What is the perimeter of the following step-shape
if all the short segments are 2 feet?
2 ft
The perimeter of the step-shape is the
same as the perimeter of the rectangle
that boxes it in as shown.
2 ft
The height of the rectangle is 6 ft and the width is 10 ft, so the
perimeter P = 2(6) +2(10) = 32 ft.
32. Area
If we connect the two
ends of a rope that’s
resting flat in a plane,
the rope form a loop
that encloses an area.
33. Area
If we connect the two
ends of a rope that’s
resting flat in a plane,
the rope form a loop
that encloses an area.
34. Area
If we connect the two
ends of a rope that’s
resting flat in a plane,
the rope form a loop
that encloses an area.
35. Area
If we connect the two
ends of a rope that’s
resting flat in a plane,
the rope form a loop
that encloses an area.
The word “area”
also denotes the amount of surface enclosed.
36. Area
If we connect the two
ends of a rope that’s
resting flat in a plane,
the rope form a loop
that encloses an area.
The word “area”
also denotes the amount of surface enclosed.
If each side of a square is 1 unit, we define the area of
the square to be 1 unit x 1 unit = 1 unit2, i.e. 1 square-unit.
37. Area
If we connect the two
ends of a rope that’s
resting flat in a plane,
the rope form a loop
that encloses an area.
The word “area”
also denotes the amount of surface enclosed.
1 in
1 in
1 in2
If each side of a square is 1 unit, we define the area of
the square to be 1 unit x 1 unit = 1 unit2, i.e. 1 square-unit.
Hence the areas of the following squares are:
1 square-inch
38. Area
If we connect the two
ends of a rope that’s
resting flat in a plane,
the rope form a loop
that encloses an area.
The word “area”
also denotes the amount of surface enclosed.
1 in
1 in
1 in2
If each side of a square is 1 unit, we define the area of
the square to be 1 unit x 1 unit = 1 unit2, i.e. 1 square-unit.
Hence the areas of the following squares are:
1 m
1 m
1 m2
1 square-inch 1 square-meter
39. Area
If we connect the two
ends of a rope that’s
resting flat in a plane,
the rope form a loop
that encloses an area.
The word “area”
also denotes the amount of surface enclosed.
1 in
1 in
1 in2
If each side of a square is 1 unit, we define the area of
the square to be 1 unit x 1 unit = 1 unit2, i.e. 1 square-unit.
Hence the areas of the following squares are:
1 m
1 m
1 mi
1 mi
1 m2 1 mi2
1 square-inch 1 square-meter 1 square-mile
40. Area
If we connect the two
ends of a rope that’s
resting flat in a plane,
the rope form a loop
that encloses an area.
The word “area”
also denotes the amount of surface enclosed.
1 in
1 in
1 in2
If each side of a square is 1 unit, we define the area of
the square to be 1 unit x 1 unit = 1 unit2, i.e. 1 square-unit.
Hence the areas of the following squares are:
1 m
1 m
1 mi
1 mi
1 m2 1 mi2
1 square-inch 1 square-meter 1 square-mile
We find the area of rectangles by cutting them into squares.
41. 2 mi
3 miArea
A 2 mi x 3 mi rectangle may be cut into
six 1 x 1 squares so it covers an area of
2 x 3 = 6 mi2 (square miles).
w
= 6 mi2
2 x 3
42. 2 mi
3 miArea
A 2 mi x 3 mi rectangle may be cut into
six 1 x 1 squares so it covers an area of
2 x 3 = 6 mi2 (square miles).
In general, given the rectangle with
height = h (units)
width* = w (units), h
w
= 6 mi2
2 x 3
A = h x w (unit2)
then its area A = h x w (unit2).
43. 2 mi
3 miArea
A 2 mi x 3 mi rectangle may be cut into
six 1 x 1 squares so it covers an area of
2 x 3 = 6 mi2 (square miles).
In general, given the rectangle with
height = h (units)
width* = w (units), h
w
= 6 mi2
2 x 3
A = h x w (unit2)
then its area A = h x w (unit2).
The area of a square is s*s = s2.
44. 2 mi
3 miArea
A 2 mi x 3 mi rectangle may be cut into
six 1 x 1 squares so it covers an area of
2 x 3 = 6 mi2 (square miles).
In general, given the rectangle with
height = h (units)
width* = w (units), h
w
= 6 mi2
2 x 3
A = h x w (unit2)
then its area A = h x w (unit2).
The area of a square is s*s = s2.
By cutting and pasting, we may find areas of other shapes.
45. 2 mi
3 miArea
A 2 mi x 3 mi rectangle may be cut into
six 1 x 1 squares so it covers an area of
2 x 3 = 6 mi2 (square miles).
In general, given the rectangle with
height = h (units)
width* = w (units), h
w
= 6 mi2
2 x 3
A = h x w (unit2)
then its area A = h x w (unit2).
The area of a square is s*s = s2.
By cutting and pasting, we may find areas of other shapes.
Example C. a. Find the area of R as shown.
Assume the unit is meter.
4
4
R
12 12
46. 2 mi
3 miArea
A 2 mi x 3 mi rectangle may be cut into
six 1 x 1 squares so it covers an area of
2 x 3 = 6 mi2 (square miles).
In general, given the rectangle with
height = h (units)
width* = w (units), h
w
= 6 mi2
2 x 3
A = h x w (unit2)
then its area A = h x w (unit2).
The area of a square is s*s = s2.
By cutting and pasting, we may find areas of other shapes.
Example C. a. Find the area of R as shown.
Assume the unit is meter.
4
4
There are two basic approaches.
R
12 12
47. 2 mi
3 miArea
A 2 mi x 3 mi rectangle may be cut into
six 1 x 1 squares so it covers an area of
2 x 3 = 6 mi2 (square miles).
In general, given the rectangle with
height = h (units)
width* = w (units), h
w
= 6 mi2
2 x 3
A = h x w (unit2)
then its area A = h x w (unit2).
The area of a square is s*s = s2.
By cutting and pasting, we may find areas of other shapes.
Example C. a. Find the area of R as shown.
Assume the unit is meter.
4
4
There are two basic approaches.
R
I. We may view R as a 12 x 12 square
with a 4 x 8 corner removed.
12
8
12
4
4
R
12 12
48. 2 mi
3 miArea
A 2 mi x 3 mi rectangle may be cut into
six 1 x 1 squares so it covers an area of
2 x 3 = 6 mi2 (square miles).
In general, given the rectangle with
height = h (units)
width* = w (units), h
w
= 6 mi2
2 x 3
A = h x w (unit2)
then its area A = h x w (unit2).
The area of a square is s*s = s2.
By cutting and pasting, we may find areas of other shapes.
Example C. a. Find the area of R as shown.
Assume the unit is meter.
4
4
There are two basic approaches.
R
I. We may view R as a 12 x 12 square
with a 4 x 8 corner removed.
12
8
12
4
4
R
12 12
Hence the area of R is
12 x 12 – 4 x 8
49. 2 mi
3 miArea
A 2 mi x 3 mi rectangle may be cut into
six 1 x 1 squares so it covers an area of
2 x 3 = 6 mi2 (square miles).
In general, given the rectangle with
height = h (units)
width* = w (units), h
w
= 6 mi2
2 x 3
A = h x w (unit2)
then its area A = h x w (unit2).
The area of a square is s*s = s2.
By cutting and pasting, we may find areas of other shapes.
Example C. a. Find the area of R as shown.
Assume the unit is meter.
4
4
There are two basic approaches.
R
I. We may view R as a 12 x 12 square
with a 4 x 8 corner removed.
12
8
12
4
4
R
12 12
Hence the area of R is
12 x 12 – 4 x 8 = 144 – 32 = 112 m2.
50. Area
Il. We may dissect R into two
rectangles labeled I and II.
12
12
4 4
I II
51. Area
Il. We may dissect R into two
rectangles labeled I and II.
12
12
4 4
8
I II
Area of I is 12 x 8 = 96,
52. Area
Il. We may dissect R into two
rectangles labeled I and II.
12
12
4 4
8
I II
Area of I is 12 x 8 = 96,
area of II is 4 x 4 = 16.
53. Area
Il. We may dissect R into two
rectangles labeled I and II.
12
12
4 4
8
I II
Area of I is 12 x 8 = 96,
area of II is 4 x 4 = 16.
The area of R is the sum of the
two or 96 + 16 = 112 m2.
54. Area
Il. We may dissect R into two
rectangles labeled I and II.
12
12
4 4
8
I II
Area of I is 12 x 8 = 96,
area of II is 4 x 4 = 16.
The area of R is the sum of the
two or 96 + 16 = 112 m2.
b. Find the area of the following shape R where all the short
segments are 2 ft.
2 ft
55. Area
Il. We may dissect R into two
rectangles labeled I and II.
12
12
4 4
8
I II
Area of I is 12 x 8 = 96,
area of II is 4 x 4 = 16.
The area of R is the sum of the
two or 96 + 16 = 112 m2.
b. Find the area of the following shape R where all the short
segments are 2 ft.
Let’s cut R into three rectangles
as shown.
2 ft
56. Area
Il. We may dissect R into two
rectangles labeled I and II.
12
12
4 4
8
I II
Area of I is 12 x 8 = 96,
area of II is 4 x 4 = 16.
The area of R is the sum of the
two or 96 + 16 = 112 m2.
b. Find the area of the following shape R where all the short
segments are 2 ft.
Let’s cut R into three rectangles
as shown.
I
II
III 2 ft
57. Area
Il. We may dissect R into two
rectangles labeled I and II.
12
12
4 4
8
I II
Area of I is 12 x 8 = 96,
area of II is 4 x 4 = 16.
The area of R is the sum of the
two or 96 + 16 = 112 m2.
b. Find the area of the following shape R where all the short
segments are 2 ft.
Let’s cut R into three rectangles
as shown.
Area of I is 2 x 2 = 4,
I
II
III 2 ft
58. Area
Il. We may dissect R into two
rectangles labeled I and II.
12
12
4 4
8
I II
Area of I is 12 x 8 = 96,
area of II is 4 x 4 = 16.
The area of R is the sum of the
two or 96 + 16 = 112 m2.
b. Find the area of the following shape R where all the short
segments are 2 ft.
Let’s cut R into three rectangles
as shown.
Area of I is 2 x 2 = 4,
area of II is 2 x 6 = 12,
I
II
III 2 ft
59. Area
Il. We may dissect R into two
rectangles labeled I and II.
12
12
4 4
8
I II
Area of I is 12 x 8 = 96,
area of II is 4 x 4 = 16.
The area of R is the sum of the
two or 96 + 16 = 112 m2.
b. Find the area of the following shape R where all the short
segments are 2 ft.
Let’s cut R into three rectangles
as shown.
Area of I is 2 x 2 = 4,
area of II is 2 x 6 = 12,
and area of III is 2 x 5 = 10.
I
II
III 2 ft
60. Area
Il. We may dissect R into two
rectangles labeled I and II.
12
12
4 4
8
I II
Area of I is 12 x 8 = 96,
area of II is 4 x 4 = 16.
The area of R is the sum of the
two or 96 + 16 = 112 m2.
b. Find the area of the following shape R where all the short
segments are 2 ft.
Let’s cut R into three rectangles
as shown.
Area of I is 2 x 2 = 4,
area of II is 2 x 6 = 12,
and area of III is 2 x 5 = 10.
Hence the total area is 4 + 12 + 10 = 16 ft2.
I
II
III 2 ft
61. Area
Il. We may dissect R into two
rectangles labeled I and II.
12
12
4 4
8
I II
Area of I is 12 x 8 = 96,
area of II is 4 x 4 = 16.
The area of R is the sum of the
two or 96 + 16 = 112 m2.
b. Find the area of the following shape R where all the short
segments are 2 ft.
Let’s cut R into three rectangles
as shown.
Area of I is 2 x 2 = 4,
area of II is 2 x 6 = 12,
and area of III is 2 x 5 = 10.
Hence the total area is 4 + 12 + 10 = 16 ft2.
I
II
III 2 ft
By cutting and pasting we obtain the following area formulas.
63. Area
A parallelogram is a shape enclosed by two sets of parallel lines.
By cutting and pasting, we may arrange a parallelogram into a
rectangle.
h
b
64. Area
A parallelogram is a shape enclosed by two sets of parallel lines.
By cutting and pasting, we may arrange a parallelogram into a
rectangle.
h
b
65. Area
A parallelogram is a shape enclosed by two sets of parallel lines.
By cutting and pasting, we may arrange a parallelogram into a
rectangle.
h
b
h
b
66. Area
A parallelogram is a shape enclosed by two sets of parallel lines.
By cutting and pasting, we may arrange a parallelogram into a
rectangle.
Hence the area of the parallelogram is A = h x b where
h = height and b = base.
h
b
h
b
67. Area
A parallelogram is a shape enclosed by two sets of parallel lines.
By cutting and pasting, we may arrange a parallelogram into a
rectangle.
Hence the area of the parallelogram is A = h x b where
h = height and b = base.
h
b
h
b
For example, the area of all
the parallelograms shown
here is 8 x 12 = 96 ft2,
so they are the same size.
12 ft
8 ft
68. Area
A parallelogram is a shape enclosed by two sets of parallel lines.
By cutting and pasting, we may arrange a parallelogram into a
rectangle.
Hence the area of the parallelogram is A = h x b where
h = height and b = base.
h
b
h
b
For example, the area of all
the parallelograms shown
here is 8 x 12 = 96 ft2,
so they are the same size.
12 ft
8 ft 12 ft8 ft
69. Area
A parallelogram is a shape enclosed by two sets of parallel lines.
By cutting and pasting, we may arrange a parallelogram into a
rectangle.
Hence the area of the parallelogram is A = h x b where
h = height and b = base.
h
b
h
b
For example, the area of all
the parallelograms shown
here is 8 x 12 = 96 ft2,
so they are the same size.
12 ft
8 ft
8 ft8 ft
12 ft12 ft
12 ft8 ft
72. Area
A triangle is half of a parallelogram.
Given a triangle, we may copy it
and paste to itself to make a
parallelogram,
h
b
h
b
73. Area
A triangle is half of a parallelogram.
Given a triangle, we may copy it
and paste to itself to make a
parallelogram, and the area of the
triangle is half of the area of the
parallelogram formed.
h
b
h
b
74. Area
A triangle is half of a parallelogram.
Given a triangle, we may copy it
and paste to itself to make a
parallelogram, and the area of the
triangle is half of the area of the
parallelogram formed.
h
b
h
b
Therefore the area of a triangle is
h x b
2
A = (h x b) ÷ 2 or A =
where h = height and b = base.
75. Area
A triangle is half of a parallelogram.
Given a triangle, we may copy it
and paste to itself to make a
parallelogram, and the area of the
triangle is half of the area of the
parallelogram formed.
h
b
h
b
Therefore the area of a triangle is
h x b
2
A = (h x b) ÷ 2 or A =
where h = height and b = base.
For example, the area of all
the triangles shown here is
(8 x 12) ÷ 2 = 48 ft2,
i.e. they are the same size.12 ft
8 ft 8 ft
76. Area
A triangle is half of a parallelogram.
Given a triangle, we may copy it
and paste to itself to make a
parallelogram, and the area of the
triangle is half of the area of the
parallelogram formed.
h
b
h
b
Therefore the area of a triangle is
h x b
2
A = (h x b) ÷ 2 or A =
where h = height and b = base.
For example, the area of all
the triangles shown here is
(8 x 12) ÷ 2 = 48 ft2,
i.e. they are the same size.12 ft
8 ft
8 ft8 ft
12 ft12 ft
12 ft
8 ft
77. Area
A trapezoid is a 4-sided figure with
one set of opposite sides parallel.
78. Area
Example D. Find the area of the
following trapezoid R.
Assume the unit is meter.
A trapezoid is a 4-sided figure with
one set of opposite sides parallel.
12
5
8
R
79. Area
By cutting R parallel to one side as shown, we split R into two
areas, one parallelogram and one triangle.
12
8
84
5
Example D. Find the area of the
following trapezoid R.
Assume the unit is meter.
A trapezoid is a 4-sided figure with
one set of opposite sides parallel.
R
80. Area
By cutting R parallel to one side as shown, we split R into two
areas, one parallelogram and one triangle.
12
8
84
The parallelogram has base = 8 and height = 5,
hence its area is 8 x 5 = 40 m2.
5
Example D. Find the area of the
following trapezoid R.
Assume the unit is meter.
A trapezoid is a 4-sided figure with
one set of opposite sides parallel.
R
81. Area
By cutting R parallel to one side as shown, we split R into two
areas, one parallelogram and one triangle.
12
8
84
The parallelogram has base = 8 and height = 5,
hence its area is 8 x 5 = 40 m2.
The triangle has base = 4 and height = 5,
hence its area is (4 x 5) ÷ 2 = 10 m2.
5
Example D. Find the area of the
following trapezoid R.
Assume the unit is meter.
A trapezoid is a 4-sided figure with
one set of opposite sides parallel.
R
82. Area
By cutting R parallel to one side as shown, we split R into two
areas, one parallelogram and one triangle.
12
Therefore the area of the trapezoid is 40 + 10 = 50 m2.
8
84
The parallelogram has base = 8 and height = 5,
hence its area is 8 x 5 = 40 m2.
The triangle has base = 4 and height = 5,
hence its area is (4 x 5) ÷ 2 = 10 m2.
5
Example D. Find the area of the
following trapezoid R.
Assume the unit is meter.
A trapezoid is a 4-sided figure with
one set of opposite sides parallel.
R
83. Area
By cutting R parallel to one side as shown, we split R into two
areas, one parallelogram and one triangle.
12
Therefore the area of the trapezoid is 40 + 10 = 50 m2.
8
84
The parallelogram has base = 8 and height = 5,
hence its area is 8 x 5 = 40 m2.
The triangle has base = 4 and height = 5,
hence its area is (4 x 5) ÷ 2 = 10 m2.
We may find the area of any trapezoid by cutting it into one
parallelogram and one triangle.
5
Example D. Find the area of the
following trapezoid R.
Assume the unit is meter.
A trapezoid is a 4-sided figure with
one set of opposite sides parallel.
R
85. Circumference and Area of Circles
A circle has a center x, and the distance
from any location on the circle to C
is a fixed number r,
r is called the radius of the circle.
r
r
x
86. Circumference and Area of Circles
A circle has a center x, and the distance
from any location on the circle to C
is a fixed number r,
r is called the radius of the circle.
r
r
x
The diameter d of the circle is the length
any straight line that goes through the
center x connecting two opposite points.
87. Circumference and Area of Circles
A circle has a center x, and the distance
from any location on the circle to C
is a fixed number r,
r is called the radius of the circle.
r
r
x
rr x
d (diameter)
The diameter d of the circle is the length
any straight line that goes through the
center x connecting two opposite points.
88. Circumference and Area of Circles
A circle has a center x, and the distance
from any location on the circle to C
is a fixed number r,
r is called the radius of the circle.
r
r
x
rr x
d (diameter)
The diameter d of the circle is the length
any straight line that goes through the
center x connecting two opposite points.
Hence d = 2r.
89. Circumference and Area of Circles
A circle has a center x, and the distance
from any location on the circle to C
is a fixed number r,
r is called the radius of the circle.
r
r
x
rr x
d (diameter)
The diameter d of the circle is the length
any straight line that goes through the
center x connecting two opposite points.
Hence d = 2r.
The perimeter C of a circle is called
the circumference and
C = πd or C = 2πr where π ≈ 3.14…
90. Circumference and Area of Circles
A circle has a center x, and the distance
from any location on the circle to C
is a fixed number r,
r is called the radius of the circle.
r
r
x
rr x
d (diameter)
The diameter d of the circle is the length
any straight line that goes through the
center x connecting two opposite points.
Hence d = 2r.
The perimeter C of a circle is called
the circumference and
C = πd or C = 2πr where π ≈ 3.14…
We may use 3 as an under–estimation for π.
91. Circumference and Area of Circles
A circle has a center x, and the distance
from any location on the circle to C
is a fixed number r,
r is called the radius of the circle.
r
r
x
rr x
d (diameter)
The diameter d of the circle is the length
any straight line that goes through the
center x connecting two opposite points.
Hence d = 2r.
The perimeter C of a circle is called
the circumference and
C = πd or C = 2πr where π ≈ 3.14…
We may use 3 as an under–estimation for π.
Example D. Is 25 feet of rope enough
to mark off a circle of radius r = 9 ft on the ground?
92. Circumference and Area of Circles
A circle has a center x, and the distance
from any location on the circle to C
is a fixed number r,
r is called the radius of the circle.
r
r
x
rr x
d (diameter)
The diameter d of the circle is the length
any straight line that goes through the
center x connecting two opposite points.
Hence d = 2r.
The perimeter C of a circle is called
the circumference and
C = πd or C = 2πr where π ≈ 3.14…
We may use 3 as an under–estimation for π.
Example D. Is 25 feet of rope enough
to mark off a circle of radius r = 9 ft on the ground?
No, 25 ft is not enough since the circumference C is at least
3 x 9 = 27 ft.
93. Circumference and Area of Circles
r
x
The area A (enclosed by) of a circle is
A = πr2 where π ≈ 3.14…
A
94. Circumference and Area of Circles
r
x
The area A (enclosed by) of a circle is
A = πr2 where π ≈ 3.14…
Example E. a. Approximate the area of
the circle with a 5–meter radius
using 3 as the estimated value of π.
A
95. Circumference and Area of Circles
r
x
The area A (enclosed by) of a circle is
A = πr2 where π ≈ 3.14…
Example E. a. Approximate the area of
the circle with a 5–meter radius
using 3 as the estimated value of π.
Estimating using 3 in stead of 3.14 …
we have the area A to be at least
3 x 52
A
96. Circumference and Area of Circles
r
x
The area A (enclosed by) of a circle is
A = πr2 where π ≈ 3.14…
Example E. a. Approximate the area of
the circle with a 5–meter radius
using 3 as the estimated value of π.
Estimating using 3 in stead of 3.14 …
we have the area A to be at least
3 x 52 = 3 x 25 = 75 m2.
A
97. Circumference and Area of Circles
r
x
The area A (enclosed by) of a circle is
A = πr2 where π ≈ 3.14…
Example E. a. Approximate the area of
the circle with a 5–meter radius
using 3 as the estimated value of π.
Estimating using 3 in stead of 3.14 …
we have the area A to be at least
3 x 52 = 3 x 25 = 75 m2.
b. Approximate the area of the circle with a 5–meter radius
using π = 3.14 as the estimated value of π.
A
98. Circumference and Area of Circles
r
x
The area A (enclosed by) of a circle is
A = πr2 where π ≈ 3.14…
Example E. a. Approximate the area of
the circle with a 5–meter radius
using 3 as the estimated value of π.
The better approximate answer using π = 3.14
is 3.14 x 52 = 3.14 x 75 = 78.5 m2
Estimating using 3 in stead of 3.14 …
we have the area A to be at least
3 x 52 = 3 x 25 = 75 m2.
b. Approximate the area of the circle with a 5–meter radius
using π = 3.14 as the estimated value of π.
A
99. Volume
The volume of a solid is the measurement of the amount of
“room” or “space” the solid occupies.
100. Volume
s
The volume of a solid is the measurement of the amount of
“room” or “space” the solid occupies.
A cube is a square–box,
i.e. a box whose edges are the same. s
s
A cube
101. Volume
s
The volume of a solid is the measurement of the amount of
“room” or “space” the solid occupies.
We define the volume of a cube whose sides are 1 unit to be
1 unit x 1 unit x 1 unit = 1 unit3, i.e. 1 cubic unit.
A cube is a square–box,
i.e. a box whose edges are the same. s
s
A cube
102. Volume
s
The volume of a solid is the measurement of the amount of
“room” or “space” the solid occupies.
We define the volume of a cube whose sides are 1 unit to be
1 unit x 1 unit x 1 unit = 1 unit3, i.e. 1 cubic unit.
A cube is a square–box,
i.e. a box whose edges are the same. s
s
A cube
1 in 1 in
1 in3
1 cubic inch
1 in
103. Volume
s
The volume of a solid is the measurement of the amount of
“room” or “space” the solid occupies.
We define the volume of a cube whose sides are 1 unit to be
1 unit x 1 unit x 1 unit = 1 unit3, i.e. 1 cubic unit.
A cube is a square–box,
i.e. a box whose edges are the same. s
s
A cube
1 in 1 in
1 in3
1 cubic inch
1 in
1 m 1 m
1 m3
1 cubic meter
1 m
104. Volume
s
The volume of a solid is the measurement of the amount of
“room” or “space” the solid occupies.
We define the volume of a cube whose sides are 1 unit to be
1 unit x 1 unit x 1 unit = 1 unit3, i.e. 1 cubic unit.
A cube is a square–box,
i.e. a box whose edges are the same. s
s
A cube
1 in 1 in
1 in3
1 cubic inch
1 in
1 m 1 m
1 m3
1 cubic meter
1 m
1 mi 1 mi
1 mi31 mi
1 cubic mile
105. Volume
s
The volume of a solid is the measurement of the amount of
“room” or “space” the solid occupies.
We define the volume of a cube whose sides are 1 unit to be
1 unit x 1 unit x 1 unit = 1 unit3, i.e. 1 cubic unit.
A cube is a square–box,
i.e. a box whose edges are the same. s
s
A cube
1 in 1 in
1 in3
1 cubic inch
1 in
1 m 1 m
1 m3
1 cubic meter
1 m
1 mi 1 mi
1 mi31 mi
1 cubic mile
We can cut larger cubes into smaller cubes to calculate their
volume.
106. Volume
A 2 x 2 x 2 cube has volume 2 x 2 x 2 = 23 = 8,
a 3 x 3 x 3 cube has volume 33 = 27,
a 4 x 4 x 4 cube has volume 43 = 64 (unit3).
107. Volume
w = width
A rectangular box is specified by three sides:
the length, the width, and the height.
We say that the dimension of the box
is “l by w by h”. l = length
h = height
A 2 x 2 x 2 cube has volume 2 x 2 x 2 = 23 = 8,
a 3 x 3 x 3 cube has volume 33 = 27,
a 4 x 4 x 4 cube has volume 43 = 64 (unit3).
108. Volume
w = width
A rectangular box is specified by three sides:
the length, the width, and the height.
We say that the dimension of the box
is “l by w by h”. l = length
h = height
A 2 x 2 x 2 cube has volume 2 x 2 x 2 = 23 = 8,
Here is a “4 by 3 by 2” box.
4 3
2
a 3 x 3 x 3 cube has volume 33 = 27,
a 4 x 4 x 4 cube has volume 43 = 64 (unit3).
109. Volume
w = width
A rectangular box is specified by three sides:
the length, the width, and the height.
We say that the dimension of the box
is “l by w by h”. l = length
h = height
A 2 x 2 x 2 cube has volume 2 x 2 x 2 = 23 = 8,
Here is a “4 by 3 by 2” box.
Assuming the unit is inch, then the box
may be cut into 2 x 3 x 4 = 24
1–inch cubes so its volume is 24 in3. 4 3
2
a 3 x 3 x 3 cube has volume 33 = 27,
a 4 x 4 x 4 cube has volume 43 = 64 (unit3).
110. Volume
w = width
A rectangular box is specified by three sides:
the length, the width, and the height.
We say that the dimension of the box
is “l by w by h”. l = length
h = height
A 2 x 2 x 2 cube has volume 2 x 2 x 2 = 23 = 8,
Here is a “4 by 3 by 2” box.
Assuming the unit is inch, then the box
may be cut into 2 x 3 x 4 = 24
1–inch cubes so its volume is 24 in3.
We define the volume V of a box whose sides are l, w, and h
to be V = l x w x h unit3.
In particular the volume of a cube whose sides equal to s is
V = s x s x s = s3 unit3.
4 3
2
a 3 x 3 x 3 cube has volume 33 = 27,
a 4 x 4 x 4 cube has volume 43 = 64 (unit3).
111. Volume
Example F. a.
How many cubic inches are there in a cubic foot?
(There are 12 inches in 1 foot.)
112. Volume
Example F. a.
How many cubic inches are there in a cubic foot?
(There are 12 inches in 1 foot.)
One cubic foot is
1 ft x 1 ft x 1ft
113. Volume
Example F. a.
How many cubic inches are there in a cubic foot?
(There are 12 inches in 1 foot.)
One cubic foot is
1 ft x 1 ft x 1ft or
12 in x 12 in x 12 in = 1728 in3.
114. Volume
Example F. a.
How many cubic inches are there in a cubic foot?
(There are 12 inches in 1 foot.)
Example b. How many cubic feet are there in the following
solid?
One cubic foot is
1 ft x 1 ft x 1ft or
12 in x 12 in x 12 in = 1728 in3.
115. Volume
Example F. a.
How many cubic inches are there in a cubic foot?
(There are 12 inches in 1 foot.)
Example b. How many cubic feet are there in the following
solid?
One cubic foot is
1 ft x 1 ft x 1ft or
12 in x 12 in x 12 in = 1728 in3.
We may view the solid is consisted of
two solids I and II as shown.
II
I
Method 1.
116. Volume
Example F. a.
How many cubic inches are there in a cubic foot?
(There are 12 inches in 1 foot.)
Example b. How many cubic feet are there in the following
solid?
One cubic foot is
1 ft x 1 ft x 1ft or
12 in x 12 in x 12 in = 1728 in3.
We may view the solid is consisted of
two solids I and II as shown.
II
I
The volume of I is 3 x 3 x 3 = 27,
the volume of II is 10 x 3 x 6 = 180.
Method 1.
117. Volume
Example F. a.
How many cubic inches are there in a cubic foot?
(There are 12 inches in 1 foot.)
Example b. How many cubic feet are there in the following
solid?
One cubic foot is
1 ft x 1 ft x 1ft or
12 in x 12 in x 12 in = 1728 in3.
We may view the solid is consisted of
two solids I and II as shown.
II
I
The volume of I is 3 x 3 x 3 = 27,
the volume of II is 10 x 3 x 6 = 180.
Hence the volume of the entire solid is
180 + 27 = 207 ft3.
Method 1.
118. Volume
The solid may be viewed as a box
with volume 3 x 10 x 9 = 270
with a top portion removed.
Method 2.
9 ft
10 ft
3 ft
119. Volume
The solid may be viewed as a box
with volume 3 x 10 x 9 = 270
with a top portion removed.
The dimension of the removed portion
is also a box with volume 3 x 3 x 7 = 63.
Method 2.
9 ft
10 ft
3 ft
3 ft
3 ft
7 ft
120. Volume
The solid may be viewed as a box
with volume 3 x 10 x 9 = 270
with a top portion removed.
The dimension of the removed portion
is also a box with volume 3 x 3 x 7 = 63.
Hence the volume of the given solid is
270 – 63 = 207 ft3.
Method 2.
9 ft
10 ft
3 ft
3 ft
3 ft
7 ft