Nonconvex great rhombicosidodecahedron

Nonconvex great rhombicosidodecahedron
Nonconvex great rhombicosidodecahedron
Nonconvex great rhombicosidodecahedron
Type Uniform star polyhedron
Elements F = 62, E = 120
V = 60 (χ = 2)
Faces by sides 20{3}+30{4}+12{5/2}
Wythoff symbol 5/3 3 | 2
Symmetry group Ih, [5,3], *532
Index references U67, C84, W105
Nonconvex great rhombicosidodecahedron
3.4.5/3.4
(Vertex figure)
DU67 great strombic hexecontahedron.png
Great deltoidal hexecontahedron
(dual polyhedron)

In geometry, the nonconvex great rhombicosidodecahedron is a nonconvex uniform polyhedron, indexed as U67. It is also called the quasirhombicosidodecahedron. It is given a Schläfli symbol t0,2{5/3,3}. Its vertex figure is a crossed quadrilateral.

This model shares the name with the convex great rhombicosidodecahedron, also known as the truncated icosidodecahedron.

Contents

Cartesian coordinates

Cartesian coordinates for the vertices of a nonconvex great rhombicosidodecahedron are all the even permutations of

(±1/τ2, 0, ±(2−1/τ))
(±1, ±1/τ3, ±1)
(±1/τ, ±1/τ2, ±2/τ)

where τ = (1+√5)/2 is the golden ratio (sometimes written φ).

Related polyhedra

It shares its vertex arrangement with the truncated great dodecahedron, and with the uniform compounds of 6 or 12 pentagonal prisms. It additionally shares its edge arrangement with the great dodecicosidodecahedron (having the triangular and pentagrammic faces in common), and the great rhombidodecahedron (having the square faces in common).

Uniform great rhombicosidodecahedron.png
Nonconvex great rhombicosidodecahedron
Great dodecicosidodecahedron.png
Great dodecicosidodecahedron
Great rhombidodecahedron.png
Great rhombidodecahedron
Great truncated dodecahedron.png
Truncated great dodecahedron
UC34-6 pentagonal prisms.png
Compound of six pentagonal prisms
UC35-12 pentagonal prisms.png
Compound of twelve pentagonal prisms

See also

External links