| A | B |
|---|
| bases | the parallel sides of a trapezoid |
| diagonals | segments that join opposite/nonadjacent vertices |
| isosceles trapezoid | quadrilateral with only one pair of opposite sides parallel and the other sides congruent |
| trapezoid | quadrilateral with only one pair of opposite sides parallel |
| kite | quadrilateral with two pairs of consecutive congruent sides |
| median | joins the midpoints of the legs of a trapezoid |
| parallelogam | quadrilateral with two pairs of opposite sides parallel |
| rectangle | quadrilateral with four right angles |
| rhombus | quadrilateral with four congruent sides |
| square | both a rectangle and a rhombus |
| sum of the interior angles | (N-2)180 |
| sum of the exterior angles | 360 |
| exterior angle of a regular polygon | 360 divided by N |
| the interior angle of a regular polygon | (N-2)180 divided by N |
| area of a parallelogram | base x height |
| area of a triangle | base x height x 1/2 |
| area of trapezoid | 1/2 x height x (b1 + b2) |
| area of a rectangle | length x width |
| area of rhombus or kite | diagonal x diagonal x 1/2 |
