Across
- 4. two lines that never intersects/ ∥
- 11. same shapes, not same size/ ~
- 12. line that start from point A
- 13. π
- 14. 1 turn = 360deg
- 15. infinite line
Down
- 1. lines that intersect at a right angle/ ⊥
- 2. equivalence of geometric shapes and size
- 3. arcsecond, 1′ = 60″
- 5. an angle of exactly 90°
- 6. line from point A to point B
- 7. arcminute 1° = 60′
- 8. |x-y|/ distance between points x and y
- 9. Δ
- 10. formed by two rays