Generally, the word
polygon is used to refer to a two dimensional construction that encloses a space using straight lines. Regular polygons have sides that are of equal length and have equal angles between each side. 'Poly-' is from the
Greek word for 'many' and '-gon' is a
Greek combining form meaning 'angle'. Strictly speaking, every
polyhedron is also a
polygon as is every
polytope, since they all have angles.
Regular Polygons
| Name | Sides | Angle* |
|---|
| Triangle | 3 | 60° |
| Square | 4 | 90° |
| Pentagon | 5 | 108° |
| Hexagon? | 6 | 120° |
| Septagon | 7 | 128.57° |
| Octagon | 8 | 135° |
| Nonagon | 9 | 140° |
| Hectagon | 100 | 176.4° |
| Megagon | 106 | 180.° |
| Googolgon | 10100 | 180.° |
* Angle= 180°-(360°/ Sides )
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