Geometry Crossword Puzzle

2. A statement that can be proved easily by applying the theorem
4. A chord that contains the center of a circle
7. Proving statements by reasoning from accepting postulates, definitions, theorems, and given information
9. Spheres that have the same center
12. Points all in one place
13. Two angles whose measures have the sum of 90
16. A segment joining two non-consecutive vertices of a polygon
18. A triangle with all sides congruent
19. Two angles in a plane that have a common vertex and a common side but no common interior points

1. The perpendicular segment from a vertex to the line containing the opposite side
3. An example used to prove that an if-then statement is true and the conclusion is false
5. Angles that have equal measures
6. A statement that contains the words "if and only if"
8. A 10-sided polygon
10. Points all in one line
11. A segment whose endpoints lie on a circle
14. The set of points in a plane that are a given distance from a given point in a plane
15. A triangle with all angles congruent
17. An angle with a measure between o and 90
20. A figure formed by two rays that have the same endpoint