Across
- 2. parallel lines
- 3. arc from point A to point B
- 4. radians angle units
- 6. equivalence of geometric shapes and size
- 11. =90°
- 12. 3 size shape
- 14. line from point A to point B
Down
- 1. arcsecond, 1′ = 60″
- 2. =3.1416
- 5. same shapes but not in size
- 7. arcminute, 1° = 60′
- 8. form by two rays
- 9. one turn equals 360°
- 10. infinite line
- 13. line start from point A