Across
- 2. angle = 90°
- 4. angle
- 7. angle
- 10. arc from point A to point B
- 11. 1 turn = 360deg
- 12. segment line from point A to point B
- 13. 1 turn = 360°
Down
- 1. infinite line
- 3. perpendicular lines (90° angle)
- 5. arcminute, 1° = 60′
- 6. parallel lines
- 8. formed by two rays
- 9. line that start from point A
- 13. prime arcsecond, 1′ = 60″