Geometry project due 12/11/09 @ 3:00 pm.

1. Geometry in the Real World Period 5 Nathan Rodriguez

2. -Point a geometric element that has position but no extension; "a point is defined by its coordinates"

3. -Line (segment) a line is a straight path that has no thickness and does not extend forever.

4. -Plane a flat surface that has no thickness and extends forever.

5. -Angle A figure formed by two rays with a common endpoint.

6. -perpendicular lines Intersecting lines to form 90 degree angles.

7. -parallel lines Lines in the same plane that don’t intersect.

8. -Triangle A three-sided polygon.

9. -Right triangle A triangle with one right angle.

10. -pentagon A five-sided polygon.

11. -hexagon A six-sided polygon.

12. -square A quadrilateral with four congruent sides and for right angles.

13. -Rectangle A quadrilateral with four right angles.

14. -trapezoid A quadrilateral with exactly one pair of parallel sides.

15. -parallelogram Quadrilateral with two pairs of parallel sides.

16. -circle The set of points in a plane that are a fixed distance from a given point called the center of a circle.

17. -cylinder A three-dimensional figure with two parallel congruent circular bases and a curved lateral surface that connects the bases.

18. -sphere The set of points in a space that are a fixed distance from a given point called the center of the sphere.

19. -pyramid A polyhedron formed by a polygonal base and triangular lateral faces that meet at a common vertex.

20. -Acute triangle A triangle with three acute angles.

21. -obtusetriangle A triangle with one obtuse angle.