Across
- 2. opposite equal acute angles
- 3. more than 90
- 5. has three sides all equal
- 8. an angle of 90°
- 11. has 4 sides 2 pairs are congruent
- 13. shape consisting of all points in a plane
- 16. 2 lines that cross at a 90
- 18. less than 90
- 19. one-dimensional, forms half of a circle.
Down
- 1. two lines that never meet
- 4. five-sided polygon or 5-gon.
- 6. lines that intersect
- 7. quadrilateral one pair of parallel sides.
- 9. a part of circumference of a circle or other curve.
- 10. opposite equal acute angles
- 12. a polyhedron with two congruent and parallel bases.
- 14. shown by a dot.
- 15. a line that is by two distinct endpoints
- 17. has 4 sides all equal