Tetradecagon
From Wikipedia, the free encyclopedia
| Regular tetradecagon | |
|---|---|
 A regular tetradecagon |
|
| Type | Regular polygon |
| Edges and vertices | 14 |
| Schläfli symbol | {14} |
| Coxeter diagram |    |
| Symmetry group | D14, order 2×14 |
| Internal angle (degrees) |  ° |
| Dual polygon | self |
| Properties | convex, cyclic, equilateral, isogonal, isotoxal |
In geometry, a tetradecagon (or tetrakaidecagon) is a polygon with 14 sides and angles.
Contents |
Regular tetradecagon [edit]
The area of a regular tetradecagon of side length a is given by
Numismatic use [edit]
The regular tetradecagon is used as the shape of some commemorative gold and silver Malaysian coins, the number of sides representing the 14 states of the Malaysian Federation.[1]
Construction [edit]
A regular tetradecagon cannot be constructed using a compass and straightedge. The animation below gives an approximation of about 0.05° on the center angle:
Construction of an approximated regular tetradecagon
Petrie polygons [edit]
The regular tetradecagon is the Petrie polygon for many higher dimensional polytopes, shown in these skew orthogonal projections, including:
References [edit]
- ^ The Numismatist, Volume 96, Issues 7-12, Page 1409, American Numismatic Association, 1983.
External links [edit]
|
|||||||||||||||||
