Across
- 5. π = 3.141592654...
- 6. deg
- 7. equivalence of geometric shapes and size
- 9. ∥
- 10. arc from point A to point B
- 11. arcsecond, 1′ = 60″ (″)
- 12. Δ
- 13. line that start from point A
- 14. infinite line
Down
- 1. |x-y|
- 2. = 90°
- 3. perpendicular lines (90° angle)(⊥)
- 4. line from point A to point B
- 8. radians angle unit
- 10. formed by two rays (∠)