Across
- 3. from point A to B
- 4. c
- 6. arcsecond
- 7. in the same direction
- 8. 3.14...
- 10. an angle formed by the intersection of two great circles of a sphere
- 12. a line that starts from point A
- 14. =360°
Down
- 1. arcminute
- 2. ≅
- 4. =90°
- 5. using a protractor to accurately measure
- 9. ∆
- 11. formed by two rays
- 13. infinite line