Tridecagon

Tridecagon
(OFF file)
Rank	2
Type	Regular
Space	Spherical
Notation
Bowers style acronym	Tad
Coxeter diagram	x13o
Schläfli symbol	{13}
Elements
Edges	13
Vertices	13
Vertex figure	Dyad, length 2cos(π/13)
Measures (edge length 1)
Circumradius	$\frac{1}{2\sin\frac{\pi}{13}} ≈ 2.08929$
Inradius	$\frac{1}{2\tan\frac{\pi}{13}} ≈ 2.02858$
Area	$\frac{13}{4\tan\frac{\pi}{13}} ≈ 13.18577$
Angle	$\frac{11\pi}{13} ≈ 152.30769°$
Central density	1
Number of pieces	13
Level of complexity	1
Related polytopes
Army	Tad
Dual	Tridecagon
Conjugates	Small tridecagram, Tridecagram, Medial tridecagram, Great tridecagram, Grand tridecagram
Abstract properties
Euler characteristic	0
Topological properties
Orientable	Yes
Properties
Symmetry	I2(13), order 26
Convex	Yes
Nature	Tame

The tridecagon is a polygon with 13 sides. A regular tridecagon has equal sides and equal angles.

Stellations

• Small tridecagram
• Tridecagram
• Medial tridecagram
• Great tridecagram
• Grand tridecagram

External links

• Bowers, Jonathan. "Regular Polygons and Other Two Dimensional Shapes".

• Wikipedia Contributors. "Tridecagon".