Icosagon

Regular icosagon
Image:Icosagon.svg A regular icosagon.
Edges and vertices	20
Schläfli symbol	{20}
Coxeter–Dynkin diagram	Image:CDW ring.png Image:CDW 20.png Image:CDW dot.png
Symmetry group	Dihedral (D₂₀)
Area (with t=edge length)	Failed to parse (Missing texvc executable; please see math/README to configure.): A = 5t^2 \cot \frac{\pi}{20} \simeq 31.5688 t^2.
Internal angle (degrees)	162°

In geometry, an icosagon is a twenty-sided polygon. The sum of any icosagon's interior angles is 3240 degrees.

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