Unit 2 and 3

5. a four-sided polygon
8. a quadrilateral with four right angles and four congruent sides
9. a quadrilateral with exactly one pair of parallel sides
11. a parallelogram with four congruent sides
12. two angles whose sum is 90 degrees
14. lines that never intersect
17. the set of all points in a plane that are the same distance from a given point(the center)
19. lines that cross at exactly one point
21. a parallelogram with 4 right angles
22. the distance from the center of a circle to any point on the circle; half the diameter

1. a triangle with no two sides of equal length
2. a triangle with 3 congruent sides and angles; all angles measure 60 degrees
3. two lines that intersect to form right angles
4. an exact location in space
6. part of a line that starts at one endpoint and extends forever in one direction
7. segment a part of a line between two endpoints
8. two angles whose sum is 180 degrees
10. the side of a right triangle opposite the right angle
13. A quadrilateral with two pairs of parallel sides
15. the distance across a circle through its center
16. a closed plane figure formed by three or more line segments
18. curved line between two points
19. a triangle with two equal sides and two equal angles
20. the distance from one point on the circle to another point on the circle (not through the center)