Geometry

3. Set of points a fixed distance from a center and is defined by a central angle.
8. The measure of any side or angle is equal to itself.
11. A triangle with all sides of equal length.
13. The set of points equidistant from a central point.
14. An angle in a circle with its vertex at the center of the circle.
15. A rigid transformation that involves flipping a figure over the line of reflection.
17. A line segment that has both endpoints on a circle
18. A transformation that maintains the shape of a figure but multiplies its dimensions by a chosen factor.
19. A quadrilateral with all sides of equal length.
20. A quadrilateral with four right angles and four sides of equal length.

1. The distance around a 2-dimensional object's exterior.
2. A quadrilateral with one pair of parallel sides.
4. A quadrilateral with two pairs of consecutive, equal sides.
5. A point on a line segment that divides it into two equal parts.
6. Formed by two radii of a central angle and the arc between their endpoints on the circle.
7. To divide into two equal parts.
9. The number of square units needed to fill up a region on a flat surface
10. The event in which the first event OR the second event occurs.
12. The event in which both the first event AND the second even occur.
16. An angle in a circle with its vertex on the circle.