Icosagon
From Wikipedia, the free encyclopedia
In geometry, an icosagon is a twenty-sided polygon.
The interior angle of a regular icosagon is 162°, and the area with a side length of a is given by
- <math>A = 5a^2 \cot \frac{\pi}{20} \simeq 31.5688 a^2.</math>
[edit] Other uses
The word "icosagon" is sometimes used as a euphemism for "swastika", since the outline of a swastika is drawn with twenty straight line segments.
[edit] External link
| Polygons |
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| Triangle | Quadrilateral | Pentagon | Hexagon | Heptagon | Octagon | Enneagon (Nonagon) | Decagon | Hendecagon | Dodecagon | Triskaidecagon | Pentadecagon | Hexadecagon | Heptadecagon | Enneadecagon | Icosagon | Icosihenagon | Tricontagon | Pentacontagon | Hectagon | Chiliagon | Myriagon |
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