Decagon (EntityTopic, 12)

From Hi.gher. Space


A decagon is a polygon with 10 sides. It is the truncated pentagon.

Coordinates

The coordinates of a regular decagon are:

(0, ±2φ)
(±1, ±√(3+4φ)
(±(1+φ), ±√(2+φ)

Equations

  • The area of a regular decagon is:

52 · √((5+2√5)/2) · l2

(

Incidence matrix

Dual: Self-dual

#TXIDVaEaTypeName
0 Va= point ;
1 Ea2= digon ;
2 10a1010= decagon ;

Usage as facets


Notable Dishapes
Flat: trianglesquarepentagonhexagonoctagondecagon
Curved: circle