Across
- 2. a tool to construct circles
- 7. a tool to measure angles
- 8. an angle that measures 180 degrees
- 11. a 2-dimensional flat surface that is infinite
- 13. a part of a line with two endpoints
- 14. an angle that measures 90 degrees
- 15. an angle that measures between 90 and 180 degrees
- 16. an angle that measures between 0 and 90 degrees
- 17. figures with the same size and shape
- 20. figures with same shape and proportional size
Down
- 1. two lines that intersect at a right angle
- 3. 2 angles whose sum is 180 degrees
- 4. 2 angles whose sum is 90 degrees
- 5. two coplanar lines that do not intersect
- 6. points that lie on the same line
- 9. three-sided polygon
- 10. a point that divides a segment into 2 equal parts
- 12. points that lie on the same plane
- 18. a part of a line with 1 endpoint extends to infinity
- 19. a figure that divides a segment or angle into 2 equal parts