Across
- 2. arc from point A to point B
- 6. triangle shape
- 7. 360°= 2ㅠ rad
- 8. ‘
- 9. 1 turn=360•
- 10. ~
- 13. line that starts from point A
- 14. infinite line
- 15. =90•
Down
- 1. ||
- 3. arcsecond,1’=60”
- 4. |x-y|=5
- 5. perpendicular lines (90•angle)
- 11. formed by two rays
- 12. radians angle unit