Hexadecagon

Regular hexadecagon

A regular hexadecagon
Type general type of this shape
Edges and vertices 16
Schläfli symbol {16}
t{8}
Coxeter–Dynkin diagrams
Symmetry group Dihedral (D16)
Internal angle (degrees) 157.5°
Properties convex, cyclic, equilateral, isogonal, isotoxal

In mathematics, a hexadecagon (sometimes called a hexakaidecagon) is a polygon with 16 sides and 16 vertices.

Contents

Regular hexadecagon

A regular hexadecagon is constructible with a compass and straightedge.

Each angle of a regular hexadecagon is 157.5 degrees, and the total angle measure of any hexadecagon is 2520 degrees.

Construction

A regular hexadecagon is constructible using compass and straightedge:

Construction of a regular hexadecagon

Area

The area of a regular hexadecagon is: (with t = edge length)

A = 4t^2 \cot \frac{\pi}{16} = 4t^2 (\sqrt{2}%2B1)(\sqrt{4-2\sqrt{2}}%2B1)

Petrie polygons

The regular hexadecagon is the Petrie polygon for many higher dimensional polytopes, shown in these skew orthogonal projections, including:

A15
15-simplex
B8
8-orthoplex

Rectified 8-orthoplex

Birectified 8-orthoplex

Trirectified 8-orthoplex

Trirectified 8-cube

Birectified 8-cube

Rectified 8-cube

8-cube
D9
t7(161)

t6(161)

t5(161)

t4(161)

t3(161)

t2(161)

t1(161)

9-demicube
(161)

External links