Enneadecagon

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Enneadecagon
Regular enneadecagon.svg
Rank2
TypeRegular
SpaceSpherical
Notation
Coxeter diagramx19o
Schläfli symbol{19}
Elements
Edges19
Vertices19
Vertex figureDyad, length 2cos(π/19)
Measures (edge length 1)
Circumradius
Inradius
Area
Angle
Central density1
Number of pieces19
Level of complexity1
Related polytopes
Army{19}
DualEnneadecagon
Conjugate8 total
Abstract properties
Euler characteristic0
Topological properties
OrientableYes
Properties
SymmetryI2(19), order 38
ConvexYes
NatureTame

The enneadecagon is a polygon with 19 sides. A regular enneadecagon has equal sides and equal angles.

A circle with radius 3 centered at the center of an enneadecagon intersects its sides. This is related to the fact that 19/3 ≈ 2π.

Stellations[edit | edit source]

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