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Decagon
Shape with ten sides / From Wikipedia, the free encyclopedia
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In geometry, a decagon (from the Greek δέκα déka and γωνία gonía, "ten angles") is a ten-sided polygon or 10-gon.[1] The total sum of the interior angles of a simple decagon is 1440°.
Quick Facts Regular decagon, Type ...
Regular decagon | |
---|---|
![]() A regular decagon | |
Type | Regular polygon |
Edges and vertices | 10 |
Schläfli symbol | {10}, t{5} |
Coxeter–Dynkin diagrams | ![]() ![]() ![]() ![]() ![]() ![]() |
Symmetry group | Dihedral (D10), order 2×10 |
Internal angle (degrees) | 144° |
Properties | Convex, cyclic, equilateral, isogonal, isotoxal |
Dual polygon | Self |
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