Tridecagon

A tridecagon is a polygon with 13 sides. It has an internal angle degree of ~152.308 degrees and a total of 6840 degrees. The area is {\displaystyle A={\frac {13}{4}}a^{2}\cot {\frac {\pi }{13}}\simeq 13.1858\,a^{2}.}

See Also

• Polygon
• Geometry

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