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# Geometry In The Real World

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### Geometry In The Real World

1. 1. Geometry in the Real world<br />Madison Davis<br />Blk 2<br />
2. 2. Point<br />Something that has position, but not extension, such as the converging point of two lines.<br />
3. 3. Line (Segment)<br />A straight figure that has a defined ends. Unlike a line which extends forever.<br />
4. 4. Plane<br />A flat, level surface. A surface generated by a straight line moving at constant velocity with respect to a fixed point.<br />
5. 5. Angle<br />The space within two lines(or line segments) or three or more planes diverging from a common point.<br />
6. 6. Perpendicular Lines<br />Line or line segments that intersect each other at a 90 degree angle.<br />
7. 7. Parallel Lines<br />Line or line segment that never intersect, ever.<br />
8. 8. Triangle<br />A closed plane figure with three sides and three angles which always add up to 180 degrees.<br />
9. 9. Right Triangle<br />A closed plane figure with three sides and three angles, however one of the angles must always be 90 degrees.<br />
10. 10. Pentagon<br />A closed plane polygon with 5 sides and 5 angles which add to 540 degrees.<br />
11. 11. Hexagon<br />A closed plane figure with 6 sides and 6 angles which add to 720 degrees.<br />
12. 12. Square<br />A closed place figure with 4 equal sides and 4 90 degree angles.<br />
13. 13. Rectangle<br />A closed plane figure with 4 sides and 4 90 degree angles.<br />
14. 14. Trapezoid<br />A quadrilateral figure with two parallel lines and two non parallel lines.<br />
15. 15. Parallelogram<br />A quadrilateral figure having both pairs of opposite sides parallel to each other.<br />
16. 16. Circle<br />A closed plane curve consisting of all given points at a distance from the center. Equation: x^2 + y^2 = r^2<br />
17. 17. Cylinder<br />A surface or solid bounded by two parallel planes and generated by a straight line moving parallel to the given planes and tracing a curve bounded by the planes and lying in a plane perpendicular or oblique to the given planes.<br />
18. 18. Sphere<br />A solid figure generated by the revolution of a semicircle about it’s diameter.<br />
19. 19. Cube<br />A solid bounded by six equal squares, the angle between any two adjacent faces being right.<br />
20. 20. Cone<br />A solid whose surface is generated by a line passing through a fixed point and a fixed plane curve not containing the point, consisting of two equal sections joined at a vertex.<br />
21. 21. Pyramid<br />A solid having a polygonal base and triangular sides which meet at one point.<br />