Across
- 3. ∥
- 8. line from point A to point B
- 10. formed by two rays
- 11. arcsecond, 1′ = 60″
- 12. line that start from point A
- 14. Δ
- 15. ⊥
Down
- 1. 1 turn = 360deg
- 2. an angle of exactly 90°
- 4. infinite line
- 5. equivalence of geometric shapes and size
- 6. |x-y|/ distance between points x and y
- 7. same shapes, not same size/ ~
- 9. π
- 13. 1° = 60′