Across
- 3. distance between x and y
- 4. triangle shape
- 7. infinite line
- 8. parallel lines
- 10. arc from Point A to point B
- 11. angle 90°
- 12. to equivalence of geometric shapes and size
Down
- 1. radians angle units
- 2. grads angle unit
- 3. 1 turn=360°
- 5. prime arcsecond, 1¹=60
- 6. same shape
- 8. constant the ratio between circumference and diameter
- 9. line start from point A
- 10. formed by two ray