| A | B |
|---|
| circle | The set of all points in a plane that are the same distance from a point called the center. |
| center | The point inside a circle that is the same distance from all points on the circle. |
| radius | The distance from the center of a circle to any point on the circle. |
| composite figure | A figure made up of two-dimensional figures. |
| circumference | The distance around the circle. |
| pi | The ratio of the circumference of a circle to its diameter. |
| semicircle | One half of a circle. |
| diameter | The distance across a circle through the center. |
