Hexacontagon
Regular hexacontagon | |
---|---|
A regular hexacontagon | |
Type | Regular polygon |
Edges and vertices | 60 |
Schläfli symbol |
{60} t{30} |
Coxeter diagram |
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
Symmetry group | Dihedral (D60), order 2×60 |
Internal angle (degrees) | 174° |
Dual polygon | self |
Properties | convex, cyclic, equilateral, isogonal, isotoxal |
In geometry, a hexacontagon or hexecontagon is a sixty-sided polygon.[1][2] The sum of any hexacontagon's interior angles is 10440 degrees.
A regular hexacontagon is represented by Schläfli symbol {60} and also can be constructed as a quasiregular truncated triacontagon, t{30}, which alternates two types of edges.
Regular hexacontagon properties
One interior angle in a regular hexacontagon is 174°, meaning that one exterior angle would be 6°.
The area of a regular hexacontagon is (with t = edge length)
and its inradius is
The circumradius of a regular hexacontagon is
A regular hexacontagon is constructible using a compass and straightedge.[3] As a truncated triacontagon, it can be constructed by an edge-bisection of a regular triacontagon. This means that the trigonometric functions of π/60 can be expressed in radicals:
Hexacontagram
A hexacontagram is a 60-sided star polygon. There are 7 regular forms given by Schläfli symbols {60/7}, {60/11}, {60/13}, {60/17}, {60/19}, {60/23}, and {60/29}, as well as 22 compound star figures with the same vertex configuration.
Picture | ![]() {60/7} |
![]() {60/11} |
![]() {60/13} |
![]() {60/17} |
![]() {60/19} |
![]() {60/23} |
![]() {60/29} |
---|---|---|---|---|---|---|---|
Interior angle | 138° | 114° | 102° | 78° | 66° | 42° | 6° |
References
- ↑ Gorini, Catherine A. (2009), The Facts on File Geometry Handbook, Infobase Publishing, p. 78, ISBN 9781438109572.
- ↑ The New Elements of Mathematics: Algebra and Geometry by Charles Sanders Peirce (1976), p.298
- ↑ Constructible Polygon
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