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# Geo In The Real World

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### Geo In The Real World

1. 1. Geometry in the Real World By: Amanda Granato
2. 2. Point A point specifies only location; it has no length, width, or depth. We usually represent a point with a dot on paper
3. 3. Line Segment A line segment is the portion of a line lying strictly between two points.
4. 4. 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.
5. 5. Angle A shape, formed by two lines or rays diverging from a common point (the vertex)
6. 6. Perpendicular Lines Two lines that intersect to form a 90° angle
7. 7. Parallel Lines Parallel lines are two lines in the same plane that never intersect
8. 8. Triangle a geometric figure having three angles and three sides; any three-sided or three-cornered figure, area, object, part, etc.
9. 9. Right Triangle A right triangle is a triangle with one right (90°) angle
10. 10. Pentagon A polygon having five sides and five interior angles.
11. 11. Hexagon a six-sided polygon
12. 12. Square a plane figure having four equal sides and four right angles
13. 13. Rectangle a parallelogram with four right angles
14. 14. Trapezoid a quadrilateral with two parallel sides
15. 15. Parallelogram a quadrilateral whose opposite sides are both parallel and equal in length
16. 16. Circle A plane curve everywhere equidistant from a given fixed point, the center
17. 17. Cylinder The surface generated by a straight line intersecting and moving along a closed plane curve
18. 18. Sphere A three-dimensional surface, all points of which are equidistant from a fixed point
19. 19. Isosceles Triangle An isosceles triangle is a triangle with two equal sides.
20. 20. Angle Bisector An angle bisector is a ray that cuts the angle exactly in half, making two equal angles.
21. 21. Edge An edge is a line segment where two faces intersect.