Across
- 3. eight-sided polygon
- 5. a parallelogram with four right angles
- 8. distance around a polygon
- 9. an angle that measures exactly 180 degrees
- 12. a triangle with two sides equal
- 13. angle that measures exactly 90 degrees
- 14. angles formed from intersecting lines that are opposite each other
- 15. an angle that measures less than 90 degrees
- 17. an instrument used to measure angles
- 19. a three-sided polygon
- 20. lines that intersect to form right angles
Down
- 1. six-sided polygon
- 2. lines in the same plane that never intersect
- 4. an instrument used to draw circles
- 6. a triangle have all sides congruent
- 7. a rectangle with four equal sides
- 10. a location in space
- 11. five-sided polygon
- 16. an angle that measures more than 90 but less than 180 degrees
- 18. part of a line having one endpoint and one direction
- 19. a quadrilateral with one pair of parallel sides