Triskaidecagon

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In Geometry, a triskaidecagon is a polygon with 13 sides and angles. The measure of each internal angle of a regular triskaidecagon is approximately 152.308 degrees, and the area with side length a is given by

<math>A = \frac{13}{4}a^2 \cot \frac{\pi}{13} \simeq 13.1858 a^2.</math>

A regular triskaidecagon is not constructible with compass and straightedge. However, it is constructible using a Neusis construction.

The current flag of the country Bahrain has an irregular triskaidecagonal red field.

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