Heptagon
Shape with seven sides / From Wikipedia, the free encyclopedia
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In geometry, a heptagon or septagon is a seven-sided polygon or 7-gon.
Quick Facts Regular heptagon, Type ...
Regular heptagon | |
---|---|
Type | Regular polygon |
Edges and vertices | 7 |
Schläfli symbol | {7} |
Coxeter–Dynkin diagrams | |
Symmetry group | Dihedral (D7), order 2×7 |
Internal angle (degrees) | ≈128.571° |
Properties | Convex, cyclic, equilateral, isogonal, isotoxal |
Dual polygon | Self |
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The heptagon is sometimes referred to as the septagon, using "sept-" (an elision of septua-, a Latin-derived numerical prefix, rather than hepta-, a Greek-derived numerical prefix; both are cognate) together with the Greek suffix "-agon" meaning angle.