Icosagon
| Regular icosagon | |
|---|---|
| File:Icosagon.svg A regular icosagon. | |
| Edges and vertices | 20 |
| Schläfli symbol | {20} t{10} |
| Coxeter–Dynkin diagram | File:CDW ring.pngFile:CDW 20.pngFile:CDW dot.png File:CDW ring.pngFile:CDW 10.pngFile:CDW ring.png |
| Symmetry group | Dihedral (D20) |
| Area (with t=edge length) |
[math]\displaystyle{ A = 5t^2 \cot \frac{\pi}{20} }[/math] [math]\displaystyle{ \simeq 31.5688\,t^2. }[/math] |
| Internal angle (degrees) |
162° |
In geometry, an icosagon is a twenty-sided polygon. The sum of any icosagon's interior angles is 3240 degrees.