| A | B |
|---|
| altitude | The perpendicular distance from the base of a geometric figure to the opposite vertex. |
| area | The number of square units needed to cover a given surface. |
| base | The number being put to a power: 8^3=8x8x8, 8 is the base. |
| circle | A closed curve with all points on the curve an equal distance from a given point called the center of the circle. |
| circumference | The distance around a circle: equal to pi times diameter. |
| parallelogram | A quadrilateral whose opposite sides are parallel and congruent. |
| pi | The ratio of the circumference of a circle to the length of its diameter: pi=3.14 or 22/7. |
| quadrilateral | A four-sided polygon (shape). |
| radius | A line segment with one endpoint at the center of a circle and the other endpoint on the circle. |
| rhombus | A parallelogram whose four sides are congruent and whose opposite angles are congruent. |
| square unit | A unit of measure that has a length of one unit and a width of one unit used to measure area. |
| trapezoid | A quadrilateral with only one pair of parallel sides, normally connected by slanted sides. |
| vertex | The point where two sides meet. |
