Scale drawings and proportions
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This document discusses scale drawings and how to solve problems using proportions. It defines key terms like scale drawing and scale. It provides examples of how to use ratios and proportions to determine actual lengths and scales when given the scale and a measurement on the drawing. Readers are walked through interpreting scale drawings, finding lengths when given a scale and measurement, and word problems that involve finding lengths or scales.
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Scale drawing ppt
This document provides a lesson on scale drawings. It begins with warm up problems, the problem of the day, and introduces the key concepts of scale drawings - including scale, reduction, enlargement, and using proportions to determine unknown scales and lengths. Examples are provided to demonstrate determining actual lengths from scale drawings and vice versa. The lesson concludes with a vocabulary section and quiz questions.
Scale and scale factor
Scale drawings and models are used to represent objects that are too large or small to depict at their actual size. A scale establishes the ratio between measurements on a drawing or model to the actual object. Scales can be written as ratios or converted to a scale factor. Using cross-multiplication in a proportion, scales allow for determining unknown measurements based on the scale ratio. Common uses of scales include maps, architectural plans, engineering drawings, and models.
5 2b scale-drawings
The document provides examples of using scale drawings and scale models to solve problems involving scale. It gives step-by-step instructions on using a map scale to find actual distances based on measured distances on a map. It also shows how to find scale factors and use them to determine actual sizes based on scaled measurements.
Using ratios in scale drawing
The document discusses scales used in maps, models, plans and drawings. It explains that a scale is a ratio that compares the size of an object to its representation. It provides examples of different scales using ratios such as 1cm = 2cm at a scale of 1:2, 1cm = 3cm at a scale of 1:3, and 5cm = 1cm at a scale of 5:1. It concludes by instructing the reader to practice scaling images using the Keynote app on their device.
Proportion
A proportion is an equation that sets two ratios equal to each other. The extremes (first and last terms) of a proportion are equal to the product of the means (middle terms). For example, if a/b = c/d, then a*d = b*c. Proportions can be used to solve scale drawings and models where the scale gives the ratio between actual dimensions and those depicted. Setting up and solving proportions allows finding unknown values when a scale ratio and one set of dimensions is given.
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Cross sections are 2D shapes that result when a 3D figure is cut by a plane. The plane can be parallel or perpendicular to the base of the 3D figure. A horizontal cross section of a cone is a circle, while a vertical cross section is a triangle. Both the horizontal and vertical cross sections of a cylinder are circles and rectangles, respectively.
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Scale drawing ppt
This document provides a lesson on scale drawings. It begins with warm up problems, the problem of the day, and introduces the key concepts of scale drawings - including scale, reduction, enlargement, and using proportions to determine unknown scales and lengths. Examples are provided to demonstrate determining actual lengths from scale drawings and vice versa. The lesson concludes with a vocabulary section and quiz questions.
Scale and scale factor
Scale drawings and models are used to represent objects that are too large or small to depict at their actual size. A scale establishes the ratio between measurements on a drawing or model to the actual object. Scales can be written as ratios or converted to a scale factor. Using cross-multiplication in a proportion, scales allow for determining unknown measurements based on the scale ratio. Common uses of scales include maps, architectural plans, engineering drawings, and models.
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The document provides examples of using scale drawings and scale models to solve problems involving scale. It gives step-by-step instructions on using a map scale to find actual distances based on measured distances on a map. It also shows how to find scale factors and use them to determine actual sizes based on scaled measurements.
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Proportion
A proportion is an equation that sets two ratios equal to each other. The extremes (first and last terms) of a proportion are equal to the product of the means (middle terms). For example, if a/b = c/d, then a*d = b*c. Proportions can be used to solve scale drawings and models where the scale gives the ratio between actual dimensions and those depicted. Setting up and solving proportions allows finding unknown values when a scale ratio and one set of dimensions is given.
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A healthy community and school environment has several key characteristics. It is a safe, clean place that promotes overall health and quality of life. A healthy school provides a safe learning environment, access to quality healthcare, and prioritizes health with support from administrators and teachers. It also encourages community participation in health-related activities and ensures the building materials and facilities like the cafeteria, laboratories, and water/air systems meet safety standards.
Properties of 2_d_3d_shapes
This document describes properties of two-dimensional and three-dimensional shapes. It defines key terms like faces, edges, vertices, parallel and perpendicular lines. It then discusses properties of common 3D shapes like cubes, cuboids, spheres, pyramids and cylinders. It notes which shapes have some perpendicular/parallel faces and edges. The document also covers types of 2D shapes including polygons, quadrilaterals, circles and triangles.
Solid Figures
This document describes properties of two-dimensional and three-dimensional shapes. It defines key terms like faces, edges, vertices, parallel and perpendicular lines. It then discusses properties of common 3D shapes like cubes, cuboids, spheres, pyramids and cylinders. It notes which shapes have some perpendicular/parallel faces and edges. The document also covers types of 2D shapes including polygons, quadrilaterals, circles and triangles.
Orderofoperations 201217015300
The document discusses using the order of operations to evaluate expressions. It provides the mnemonic "Please Excuse My Dear Aunt Sally" (PEMDAS) to remember the order: Parentheses, Exponents, Multiply/Divide (left to right), Add/Subtract (left to right). Several examples are worked through step-by-step to demonstrate evaluating expressions according to this order. The document also covers evaluating expressions when variables are substituted with values.
Orderofoperations 201217015040
This document explains the order of operations (PEMDAS) for solving math problems with multiple operations:
1) Perform operations inside parentheses first, from left to right.
2) Evaluate exponents next, from left to right.
3) Do multiplication and division from left to right.
4) Finish with addition and subtraction from left to right.
Orderof operations
The document discusses evaluating expressions using the proper order of operations. It provides the mnemonic device PEMDAS (Parentheses, Exponents, Multiply, Divide, Add, Subtract) to remember the correct sequence. Several examples are worked through step-by-step to demonstrate applying the order of operations. The objective is for students to be able to evaluate expressions like 7 + 4 * 3 as 19, not 33, by following PEMDAS.
Order of operations
The document explains the order of operations (PEMDAS) for solving math problems with multiple operations:
1) Perform operations inside parentheses first from left to right.
2) Perform exponents next from left to right.
3) Perform multiplication and division from left to right.
4) Perform addition and subtraction from left to right.
Some example problems are provided to demonstrate how to use PEMDAS to solve multi-step equations in the proper order of operations.
Sagisag Ng Ating Bansa
Our national anthem "Lupang Hinirang" was composed in 1898 by Julian Felipe as a poem to inspire patriotism. In 1933, the lyrics were set to music composed by Nicanor Abelardo. The song was officially declared the Philippine national anthem through Executive Order No. 274 on August 8, 1998 during the presidency of Fidel V. Ramos.
Exponents
This document contains a lesson on exponents. It begins with examples of simplifying exponential expressions like 2^2, 3^3, and 5^5. It then introduces representing numbers with exponents, like writing 2,401 as 7^4 or 243 as 3^5. The lesson explains that the exponent tells how many times to use the base as a factor. It provides examples of applying exponents to problems involving doubling or tripling quantities over multiple days. It concludes with a quiz reviewing evaluating and writing exponential expressions.
Logo worksheet
1) A company logo is an important symbol that represents success and achievement to the public, as demonstrated by logos of major companies like Microsoft, Nike, and Reebok.
2) Successful logos are usually simple in design, easy to understand from a distance, use one or two colors, have easy-to-read writing if present, and sometimes feature a simple drawing or symbol.
3) Students are tasked with listing existing company logos, designing their own logo by detailing 10 elements, and drawing their final logo design.
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Scale drawings and proportions
- 1. PROPORTIONS AND SCALE DRAWINGS T E X T B O O K PA G E S 4 3 0 - 4 3 5
- 2. OBJECTIVE • I can solve scale drawing problems using proportions.
- 3. VOCABULARY • Scale Drawing: is the same shape but not the same size. A map is a scale drawing. The units are very important. • Scale: tells us how the drawings dimensions and the actual dimensions are related. (Ratio) • The standard way to write the scale is scale model to actual object or scale:actual
- 4. INTERPRETING SCALE DRAWING • 3 inches • The scale is 1 in. : 5ft • Find the actual length of the canoe. • 1in 3 in. 5ft ?ft What did you do to 1 to get to 3. Multiplied by 3. So multiply 5 by 3 to get 15 ft.
- 5. TRY SOME! • The scale of a drawing 2 in.: 6m • Length of the drawing = 8in. • Length of object = __________ • Length of object = 36 m • Length of drawing = __________
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- 7. FINDING THE SCALE! • A museum is creating a full sized T-Rex from a model. The model is 40 inches in length. The resulting dinosaur will be 40 feet tall in length. What is the models scale? • Write a ratio. Make sure both measures are in inches. Then simplify. • 40in = 40 in 40 ft 480 in The model scale is 1:12