Pentacontagon

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In geometry, pentacontagon is a polygon with 50 sides. The measure of each angle of a regular pentacontagon is 172.8°, and the area with side length a is given by

<math>A = \frac{25}{2}a^2 \cot \frac{\pi}{50} \simeq 198.682 a^2.</math>

Polygons
Triangle \| Quadrilateral \| Pentagon \| Hexagon \| Heptagon \| Octagon \| Enneagon (Nonagon) \| Decagon \| Hendecagon \| Dodecagon \| Triskaidecagon \| Pentadecagon \| Hexadecagon \| Heptadecagon \| Enneadecagon \| Icosagon \| Icosihenagon \| Tricontagon \| Pentacontagon \| Hectagon \| Chiliagon \| Myriagon