Octadecagon

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Octadecagon
Rank2
TypeRegular
Notation
Bowers style acronymOd
Coxeter diagramx18o ()
Schläfli symbol{18}}
Elements
Edges18
Vertices18
Vertex figureDyad, length 2cos(π/18)
Measures (edge length 1)
Circumradius
Inradius
Area
Angle160°
Central density1
Number of external pieces18
Level of complexity1
Related polytopes
ArmyOd
DualOctadecagon
ConjugatesOctadecagram, great octadecagram
Abstract & topological properties
Flag count36
Euler characteristic0
OrientableYes
Properties
SymmetryI2(18), order 36
Flag orbits1
ConvexYes
NatureTame

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

It is the uniform truncation of the enneagon.

Stellations[edit | edit source]

External links[edit | edit source]