Snub icosidodecadodecahedron

Snub icosidodecadodecahedron
Snub icosidodecadodecahedron
Snub icosidodecadodecahedron
Type Uniform star polyhedron
Elements F = 104, E = 180
V = 60 (χ = −16)
Faces by sides (20+60){3}+12{5}+12{5/2}
Wythoff symbol |5/3 3 5
Symmetry group I, [5,3]+, 532
Index references U46, C58, W112
Snub icosidodecadodecahedron
3.3.3.5.3.5/3
(Vertex figure)
DU46 medial hexagonal hexecontahedron.png
Medial hexagonal hexecontahedron
(dual polyhedron)

In geometry, the snub icosidodecadodecahedron is a nonconvex uniform polyhedron, indexed as U46.

Cartesian coordinates

Cartesian coordinates for the vertices of a snub icosidodecadodecahedron are all the even permutations of

(±2α, ±2γ, ±2β),
(±(α+β/τ+γτ), ±(-ατ+β+γ/τ), ±(α/τ+βτ-γ)),
(±(-α/τ+βτ+γ), ±(-α+β/τ-γτ), ±(ατ+β-γ/τ)),
(±(-α/τ+βτ-γ), ±(α-β/τ-γτ), ±(ατ+β+γ/τ)) and
(±(α+β/τ-γτ), ±(ατ-β+γ/τ), ±(α/τ+βτ+γ)),

with an even number of plus signs, where

α = ρ+1,
β = τ2ρ22ρ+τ,
γ = ρ2+τρ,

and where τ = (1+√5)/2 is the golden mean and ρ is the real solution to ρ3=ρ+1, or approximately 1.3247180. ρ is called the plastic constant. Taking the odd permutations of the above coordinates with an odd number of plus signs gives another form, the enantiomorph of the other one.

See also

External links