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Geometric shapes: 2-dimensional
The shapes shown below may be useful reminders to you as you help with your child’s geometry homework. Each geometry shape includes a brief description and an illustrated example.
List of shapes
Shape |
Description |
|
| Polygon | A closed figure made of line segments each of which intersects with exactly two other line segments. |  |
| Quadrilateral | 4-sided polygon |  |
| Square | A quadrilateral having all sides equal in length and forming right angles. |  |
| Triangle | A 3-sided polygon (sum of internal angles = 180°) |  |
| Rectangle | A 4-sided polygon with all right angles. |  |
| Parallelogram | 4-sided polygon with two pairs of parallel sides. |  |
| Pentagon | 5-sided polygon (the graphic shows a regular hexagon with "regular" meaning each of the sides are equal in length) |  |
| Hexagon | 6-sided polygon |  |
| Heptagon | 7-sided polygon |  |
| Octagon | 8-sided polygon |  |
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