Across
- 3. 3.141592654
- 8. same shape but not same size
- 9. An angle can be measured using a protractor, precisely
- 10. C
- 12. infinite line
- 13. grads angle unit
- 15. formed two rays
Down
- 1. a notation used to denote the second derivative of a function
- 2. 90°
- 4. from A to B
- 5. the distances between pairs of points.
- 6. Δ
- 7. line that start from point A
- 11. °
- 14. '⌒'