Circle Review

4. a regular quadrilateral, which means that it has four equal sides and four equal angles
7. the point where the angle bisectors intersect
8. a point or line common to lines or surfaces that intersect
12. the intersection of the medians
13. a polygon that is equiangular and equilateral
15. dozen
16. a line from the center of a regular polygon at right angles to any of its sides
17. the set of all points in a plane that are at a given distance from a given point
19. a straight line that touches the circle at one point
20. a polygon with four edges (or sides) and four vertices
22. a line segment extending from the center of a circle or sphere to the circumference
23. a triangle in which all three sides are equal
24. a 5-sided polygon
25. occur when two circles on the same plane intersect at exactly one point, but one circle lies outside the other circle
26. at an angle of 90° to a given line
29. perimeter of a circle
30. the sum of all the internal angles of it is 1080°
31. the regular one has 27 diagonals

1. a figure with at least three straight sides and angles
2. occur when two circles on the same plane intersect at exactly one point and one circle lies within the other
3. to divide something into two equal parts
4. a straight line intersecting the circle at two points
5. a triangle that has two sides of equal length
6. a circle which passes through all the vertices of the polygon
7. an angle of a polygon contained between two adjacent sides
9. an angle formed between the side of a shape and the side next to it, when this side is extended
10. part of the circumference
11. a triangle that has all of its vertices on a circle
14. the plane figure enclosed by two radii of a circle or ellipse and the arc between them
18. sum of all the interior angles is 1440°
21. a polygon with three edges and three vertice
27. honeycombed
28. a shape with seven straight sides