| A | B |
|---|
| Pentagon | A polygon with five sides |
| Hexagon | A polygon with six sides |
| Octagon | A polygon with eight sides |
| Decagon | A polygon with ten sides |
| Regular | A polygon in which all the sides and angles are equal |
| Square | A quadrilateral that has four equal sides and four right angles |
| Rectangle | A quadrilateral with four right angles and two pairs of parallel sides. The opposite sides must be equal, but all four sides may not be. |
| Parallelogram | A quadrilateral with two pairs of parallel sides |
| Rhombus | A quadrilateral that has four equal sides, but no right angles |
| Trapezoid | A quadrilateral with exactly one pair of parallel lines |
| Equilateral Triangle | A triangle that has three equal sides and three equal angles |
| Right Triangle | A triangle in which two sides meet at a ninety-degree angle |
| Isosceles Triangle | A triangle that has at least two equal sides and angles |
| Scalene Triangle | A triangle in which all three sides have different lengths |
| 180 degrees | The sum of the angles for any angle |
