Across
- 3. a segment whose endpoints lie on a circle
- 4. an angle with measure 180
- 5. a segment joining two non-consecutive vertices of a polygon
- 7. a statement that can be proved
- 9. a statement that can be proved easily by applying the theorem
- 12. the set of all points
- 14. a figure formed by two rays that have the same endpoint
- 17. points all in one plane
- 18. a statement that contains the words "if and only if"
- 20. an angle with measure 90
Down
- 1. a 10-sided polygon
- 2. a statement that is accepted without proof
- 6. a 5-sided polygon
- 8. points all in one line
- 10. an angle with measure between 0 and 90
- 11. a quadrilateral with four congruent sides
- 13. a line that contains a chord
- 15. the point that divides the segment into two congruent segments
- 16. an 8-sided polygon
- 19. two angles whose measures have the sum 90