Across
- 4. arcminute, 1°=60'
- 6. grads angle unit
- 8. arc from point A to point B
- 10. line from point A to point B
- 11. |x-y|
- 13. ∡
- 14. line that start from point A
- 15. formed by two rays
Down
- 1. arcsecond, 1'=60°
- 2. ||
- 3. △
- 5. It has a value of 3.14159
- 7. same shapes, not same size
- 9. equivalence of geometric shapes and size
- 12. 1 turn=360°