Across
- 1. dividing or cutting into half
- 5. a polygon which all sides are equal
- 7. a polygon with six sides
- 8. a triangle with two or more equal sides
- 9. a polygon with four sides
- 10. a part of a disc
- 12. a polygon with seven sides
- 16. the perimeter of a circle
- 19. a regular triangle
- 20. a polygon with nine sides
- 21. supplementary of an interior angle
- 24. d=R+r
- 26. the distance between a chord and the center of the circle
- 27. a polygon with ten sides
- 28. forming a 90degree angle
- 29. a plane figure with at least three straight sides and angle
- 30. a polygon with eight sides
Down
- 2. a polygon with three sides
- 3. a circle which has all vertices of a polygon on it
- 4. a line that meets a circle once
- 6. a polygon with twelve sides
- 11. any of the line segments from its center to its perimeter
- 13. a triangle which three vertices are all on the circle
- 14. a line that meets the circle twice
- 15. a polygon with five sides
- 17. d=R-r(R is larger than r$
- 18. 2radii
- 22. an angle inside a polygon
- 23. the meeting point of two or more lines
- 25. a regular quadrilateral
- 31. a line segment which two vertices are on the circle