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Decagram (geometry)
10-pointed star polygon / From Wikipedia, the free encyclopedia
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In geometry, a decagram is a 10-point star polygon. There is one regular decagram, containing the vertices of a regular decagon, but connected by every third point. Its Schläfli symbol is {10/3}.[1]
Quick Facts Regular decagram, Type ...
Regular decagram | |
---|---|
![]() A regular decagram | |
Type | Regular star polygon |
Edges and vertices | 10 |
Schläfli symbol | {10/3} t{5/3} |
Coxeter–Dynkin diagrams | ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
Symmetry group | Dihedral (D10) |
Internal angle (degrees) | 72° |
Properties | star, cyclic, equilateral, isogonal, isotoxal |
Dual polygon | self |
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The name decagram combines a numeral prefix, deca-, with the Greek suffix -gram. The -gram suffix derives from γραμμῆς (grammēs) meaning a line.[2]