Across
- 4. a polygon with ten sides
- 8. a polygon with four sides
- 11. a triangle whose angles are less than 90
- 12. a triangle that has one angle equal to 90 degrees
- 13. a quadrilateral with equal sides and different angles
- 14. the sum of interior angles in a triangle
Down
- 1. a triangle that has two equal sides
- 2. a triangle that has no equal sides
- 3. a four-sided polygon with pairs of parallel sides
- 5. a triangle with all equal sides
- 6. a polygon with the least number of sides
- 7. a polygon with 7 sides
- 9. a regular polygon with 5 sides
- 10. a polygon with 5 sides
- 15. a polygon with 12 sides