| A | B |
|---|
| Polygon | A plane figure formed by 3 or more sides |
| Quadrilateral | Figure with 4 sides |
| Pentagon | Figure with 5 sides |
| Hexagon | Figure with 6 sides |
| Heptagon | Figure with 7 sides |
| Octagon | Figure with 8 sides |
| Nonagon | Figure with 9 sides |
| Decagon | Figure with 10 sides |
| Dodecagon | Figure with 12 sides |
| Convex | A figure where no exterior point lies on the interior of two sides |
| Concave | A figure where an exterior point lies on the interior of two sides |
| 180(n-2) | equation used to find the sum of the interior angles of a figure |
| Diagonal | Connects two non-collinear vertices |
| Parallelogram | A quadrilateral with two pairs of opposite parallel sides |
| Trapezoid | A quadrilateral with one pair of opposite parallel sides |
| Rhombus | A parallelogram with 4 congruent sides |
| Rectangle | A parallelogram with 4 right angles |
| Square | A parallelogram with 4 congruent sides and 4 congruent angles |
