Octagon
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| Regular octagon | |
|---|---|
 A regular octagon | |
| Teep | Regular polygon |
| Edges an vertices | 8 |
| Schläfli seembol | {8}, t{4} |
| Coxeter diagram |     |
| Symmetry group | Dihedral (D8), order 2×8 |
| Internal angle (degrees) | 135° |
| Dual polygon | Sel |
| Properties | Convex, cyclic, equilateral, isogonal, isotoxal |
In geometry, an octagon (frae the Greek ὀκτάγωνον oktágōnon, "aicht angles") is a regular polygon that haes aicht sides. A regular octagon is representit bi the Schläfli seembol {8}.