Circle Review

2. a polygon with ten sides and ten angles
4. a straight line and an arc have two common points
6. one line is at a right angle to the other
7. three angle bisectors’ node in a triangle
8. three midlines’ node in a triangle
11. a parallelogram which adjacent sides are equal and one angle is a right angle
12. a pattern formed by three or more than three sides
14. a closed graph formed by the sequential connection of three line segments that are not on the same straight line
21. a polygon with seven sides and seven angles
22. the circumference is intersected with the vertices of the polygon
23. a polygon with five sides and five angles
24. the line segment between two points on the circle
25. a line has only one common point of a circle
26. the triangle that at least two sides are equal
27. d=R-r
28. a closed 2d figure enclosed by four uncrossed line segments that are not on the same straight line
30. distance from the chord to the center
32. the distance from the center to the circumference
33. a polygon with nine sides and nine angles

1. the longest chord in a circle
3. the triangle that each side are equal and each interior angle are equal too
5. the angle between two adjacent sides’ extension cord of a polygon
9. a moving point moves a circle around a fixed point for a certain distance
10. one line and one circle or two circles have two common points
13. a polygon with twelve sides and twelve angles
15. the triangle which three vertices are all on the circumference
16. the angle between two adjacent sides of a polygon
17. d=R+r
18. a polygon with equal sides and angles
19. a pattern formed by an arc and two radii passing through each end of the arc
20. one line segment divided into two equal line segments
29. a polygon with six sides and six angles
31. a polygon with eight sides and eight angles