| A | B |
|---|
| diagonal | In a polygon, a segment that connects nonconsecutive vertices of the polygon |
| parallelogram | A quadrilateral with parallel opposite sides. |
| rectangle | A quadrilateral with 4 right angles |
| rhombus | A quadrilateral with all 4 sides congruent. |
| square | A quadrilateral with 4 right angles and 4 congruent sides |
| trapezoid | A quadrilateral with exactly one pair of parallel sides. |
| base of a parallelogram | any side |
| legs of a trapezoid | nonparallel sides |
| base of a trapezoid | parallel sides |
| base angles (trapezoid) | Pairs of angles with their vertices at the endpoints of the same base. |
