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# in the real world geometry

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### in the real world geometry

1. 1. Geometry In The Real World <br />By Nick Holt <br />Block 1 A-day<br />12/11/09<br />
2. 2. Point<br />An undefined term in geometry, it names a location and has no size<br />
3. 3. Line <br />An undefined term in geometry, a line is a straight path that has no thickness and extends forever.<br />
4. 4. Plane<br />An undefined term in geometry, it is a flat surface that has no thickness and extends forever.<br />
5. 5. Angle<br />A figure formed by two rays with a common endpoint.<br />
6. 6. Perpendicular lines<br />Lines that intersect at 90 degree angles.<br />
7. 7. Parallel lines<br />Lines in the same plane that do not intersect.<br />
8. 8. Triangle<br />A three sided polygon.<br />
9. 9. Right Triangle<br />A triangle with one right angle.<br />
10. 10. Pentagon<br />A five-sided polygon.<br />
11. 11. Hexagon<br />A six-sided polygon.<br />
12. 12. Square<br />A quadrilateral with four congruent sides and four right angles.<br />
13. 13. Rectangle<br />A quadrilateral with four right angles.<br />
14. 14. Trapezoid<br />A quadrilateral with exactly one pair of parallel sides.<br />
15. 15. Parallelogram<br />A quadrilateral with two pairs of parallel sides.<br />
16. 16. Circle<br />The set of two points in a plane that are a fixed distance from a given point called the center of the circle.<br />
17. 17. Cylinder<br />A three dimensional figure with two parallel congruent circular bases and a curved lateral surface that connects the bases.<br />
18. 18. Sphere<br />The set of points in space that are a fixed distance from a given point called the center of the sphere.<br />
19. 19. Cube<br />A prism with six square faces <br />
20. 20. Regular pyramid<br />A pyramid whose base is a regular polygon and whose lateral faces are congruent isosceles triangles.<br />
21. 21. Right cone<br />A cone whose axis is perpendicular to the base.<br />