Across
- 2. plane shapes with four sides and four interior angles
- 4. two angles= 180°
- 6. numbers that multiplied by its own
- 7. has three angles
- 9. sum of two angles= 180°
- 12. >90° <180°
- 14. 90°
- 15. measuring instrument for angles
Down
- 1. 1-infinity, 0≠
- 3. only has 1 factor, 1 and itself
- 5. polygon with 5 sides
- 8. original name of algebra
- 10. used to find prime factor of a number and looks like a tree
- 11. number multiplied by it's own
- 13. letters that substitute missing numbers