Across
- 1. Triangle with two equal sides
- 5. Has no width and length
- 7. Point that bisects the segment
- 8. Two angles whose sum is 90 degrees
- 11. Points that lie on the same plane
- 14. Polygon with four sides
- 15. Closed figure with straight sides
- 17. Four-sided polygon that is both equilateral and equiangular
- 19. Its length is infinite
- 20. Means “angle”
Down
- 2. Two angles whose sum is 180 degrees
- 3. Non-coplanar lines that never meet
- 4. Line that connects two non-consecutive side of a polygon
- 6. Supplementary angles that are also adjacent
- 9. Polygon with equal sides and equal angles
- 10. Polygon with nine sides
- 12. Four-sided polygon whose sides are all equal
- 13. With one endpoint and the other has no end
- 16. Triangle with three acute angles
- 18. Angle that measures exactly 90 degrees