Heptacontadigon
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| Regular heptacontadigon | |
|---|---|
 A regular heptacontadigon | |
| Type | Regular polygon |
| Edges and vertices | 72 |
| Schläfli symbol | {72}, t{36}, tt{18}, ttt{9} |
| Coxeter diagram |       |
| Symmetry group | Dihedral (D72), order 2×72 |
| Internal angle (degrees) | 175° |
| Dual polygon | Self |
| Properties | Convex, cyclic, equilateral, isogonal, isotoxal |
In geometry, a heptacontadigon (or 72-gon) is a polygon with 72 sides. The sum of any 72-gon's interior angles is 12,600 degrees.
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