Octadecagon

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Octadecagon
Regular octadecagon.svg
Rank2
TypeRegular
SpaceSpherical
Info
Coxeter diagramx18o
Schläfli symbol{18}
SymmetryI2(18), order 36
Army{18}
Elements
Vertex figureDyad, length 2cos(π/18)
Edges18
Vertices18
Measures (edge length 1)
Circumradius
Inradius
Area
Angle160°
Central density1
Euler characteristic0
Related polytopes
DualOctadecagon
Properties
ConvexYes
OrientableYes
NatureTame

The octadecagon is a polygon with 18 sides. A regular octadecagon has equal sides and equal angles.

Stellations[edit | edit source]

External links[edit | edit source]