Across
- 4. infinite line
- 6. line from point A to point B
- 8. arc from point A to point B
- 12. =90deg
- 13. triangle shapes
- 14. arcsecond, 1=60
- 15. line that starts from point A
Down
- 1. perpendicular lines(90 angle)
- 2. Formed by two rays
- 3. distance between x and y
- 5. 1turn=360deg
- 7. same shapes not same size
- 9. equivalence of geometric shapes and size
- 10. parallel lines
- 11. arcminute,1=60