The wire frame figure of the 600-cell consists of 72 flat regular decagons.
2.
If all of the diagonals of a regular decagon are drawn, the resulting figure will have exactly 220 regions.
3.
Deeper truncations of the regular decagon and decagram can produce isogonal ( vertex-transitive ) intermediate icosagram forms with equally spaced vertices and two edge lengths.
4.
The highest symmetry irregular decagons are "'d10 "', a duals of each other and have half the symmetry order of the regular decagon.
5.
These are formed using a set of five tile shapes, namely a regular decagon, an elongated hexagon, a bow tie, a rhombus, and a regular pentagon.
6.
Because 10 is the product of a power of 2 ( namely 2 1 ) with nothing but distinct Fermat primes ( specifically 5 ), a regular decagon is a constructible polygon.
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