Across
- 1. a line segment with both of its end points on the circumference
- 5. a line cutting another line in half
- 7. polygon with equal sides
- 9. regular polygon with 10 sides
- 10. the two circles are at the same side of the tangent
- 12. a fixed, multi-sided figure
- 13. a circle which passes through all the vertices of the polygon.
- 14. diameter
- 15. the distance between the chord and the center
- 17. regular polygon with four sides
- 18. regular polygon with 12 sides
- 19. fan
- 21. crossing each other
- 24. the two circles are at different sides of the tangent
- 28. four sided polygon
- 29. regular polygon with 6 sides
- 30. regular polygon with 7 sides
Down
- 2. regular polygon with 8 sides
- 3. triangle with equal legs
- 4. a line touching the circumference with 2 overlap points
- 6. regular polygon with three sides
- 8. regular polygon with 9 sides
- 10. the triangle with all vertexes on the circumference
- 11. the two lines’ intersect angle is 90 degrees
- 12. regular polygon with 5 sides
- 16. radius
- 20. polygon with three sides
- 22. an angle out side of a fixed figure
- 23. the angle within a figure
- 25. a line touching the circumference with only one touching point
- 26. the center of the inscribed circle of a polygon
- 27. the center of the circumcircle