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# Geo In The Real World

## on Dec 11, 2009

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geometry project

geometry project

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## Geo In The Real WorldPresentation Transcript

• Geometry in the Real World By: Amanda Granato
• Point A point specifies only location; it has no length, width, or depth. We usually represent a point with a dot on paper
• Line Segment A line segment is the portion of a line lying strictly between two points. View slide
• Plane A plane is a flat, two-dimensional object. We often represent a plane by a piece of paper, a blackboard, or the top of a desk. In fact, none of these is actually a plane, because a plane must continue infinitely in all directions and have no thickness at all. A plane can be defined by two intersecting lines or by three non-collinear points. View slide
• Angle A shape, formed by two lines or rays diverging from a common point (the vertex)
• Perpendicular Lines Two lines that intersect to form a 90° angle
• Parallel Lines Parallel lines are two lines in the same plane that never intersect
• Triangle a geometric figure having three angles and three sides; any three-sided or three-cornered figure, area, object, part, etc.
• Right Triangle A right triangle is a triangle with one right (90°) angle
• Pentagon A polygon having five sides and five interior angles.
• Hexagon a six-sided polygon
• Square a plane figure having four equal sides and four right angles
• Rectangle a parallelogram with four right angles
• Trapezoid a quadrilateral with two parallel sides
• Parallelogram a quadrilateral whose opposite sides are both parallel and equal in length
• Circle A plane curve everywhere equidistant from a given fixed point, the center
• Cylinder The surface generated by a straight line intersecting and moving along a closed plane curve
• Sphere A three-dimensional surface, all points of which are equidistant from a fixed point
• Isosceles Triangle An isosceles triangle is a triangle with two equal sides.
• Angle Bisector An angle bisector is a ray that cuts the angle exactly in half, making two equal angles.
• Edge An edge is a line segment where two faces intersect.