Across
- 4. formed by two rays
- 5. arcminute, 1° = 60′
- 6. arc from point A to point B
- 9. ⊥
- 12. 1 turn = 360°
- 13. infinite line
- 14. degree
- 15. |x-y|
Down
- 1. Δ
- 2. same shapes, not same size
- 3. line segment
- 7. radians angle unit
- 8. ∥
- 10. line that start from point A
- 11. radians