Heptagon
A heptagon
A heptagon/septagon/7-gon is a shape with 7 sides and 7 corners.
Regular heptagon
All sides of a regular heptagon are the same length. Each corner is 147.27°. All corners added together equal 6840°.
Area
The amount of space a regular heptagon takes up is
![{\displaystyle A={\frac {7}{4}a^{2}\cot {\frac {\pi }{7}\simeq 3.634a^{2}.}](https://wikimedia.org/api/rest_v1/media/math/render/svg/c24ad7ba85ad9b7de3b905fd75e46f9fd1f44a28)
a is the length of one of its sides.
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Special cases, including regular polygons with their own names, in parentheses List of polygons by number of sides |
1–10 sides | | |
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11–20 sides | |
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21–30 sides | |
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31–40 sides | |
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41–50 sides | |
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51–100 sides (selected) | |
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Star polygons (5–12 sides) | |
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>100 sides | |
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Triangles | |
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Quadrilaterals | |
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