Across
- 5. formed by two rays
- 8. prime arcsecond, 1'=60"
- 9. grads angle unit
- 10. perpendicular lines(90°angle)
- 11. parallel lines
- 12. radians angle unit
- 14. triangle shape
- 15. line that start from point A
Down
- 1. distance between points x and y
- 2. arcminute, 1°=60'
- 3. infinite line
- 4. to equivalence of geometric shapes and size
- 6. segment line from point A to point B
- 7. same shapes, not same size
- 13. 1 turn=360deg