| A | B |
|---|
| Diameter | line segment across circle through the center |
| Radius | line segment from center of circle to one point on the circle |
| Circumference | distance around the circle |
| Right Angle | An angle that forms a 90 degree angle |
| Area | Amount of space inside a closed figure |
| Perimeter | The measure of the distance around a figure |
| Height | How tall your shape is. Meets at base to form a right angle |
| Base | One side of a parallelogram or triangle |
| Perpendicular Lines | Lines that meet at right angles |
| Pi | Ratio of a circle's circumference to its diameter, 3.14 |
