| A | B |
|---|
| perimeter | measures the distance around a polygon |
| area | amount of space enclosed by a figure; the number of non-overlapping square units required to fill the region enclosed by a figure or curve; measured in square units |
| volume | space inside a 3D figure; measured in cubic units |
| surface area | he sum of the areas of all the faces of a solid figure; measured in square units |
| pi | the ratio of the circumference of a circle to its diameter |
| 22/7 | fractional approximation of pi |
| 3.14 | decimal approximation of pi |
| diameter | line passing through the center of a figure; distasnce across a circle through the center; a chord with endpoints on the circle that passes through the center of the circle |
| radius | distance from the center of a circle to any point on the circle |
| circumference | distance around a circle; sometimes called the perimeter of a circle |
| area of a circle | calculated by multuplying pi by the square of the radius |
| calculating circumference | multuply pi by the diameter or multiply pi by twice the radius |
