Across
- 2. Compass opening
- 5. Half diameter
- 8. Measure of a surface
- 9. Measures an angle
- 11. Set of books written by a famous greek mathematician
- 12. Greek mathematician
- 13. Equidistant from each endpoints
Down
- 1. Longest chord of a circle
- 3. French mathematician
- 4. Angle formed by a pair of perpencidular lines
- 6. Set of points equidistant from a center
- 7. Nothing in common
- 10. Earth measure
- 11. On a side of a segment line