The Great Rhombicosidodecahedron

A semi-regular polyhedron with a square, a hexagon, and a decagon meeting at each vertex.

The great rhombicosidodecahedron is one of the thirteen archimedian solids. Each of its faces belongs to one of three circubscribing solids: the dodecahedron, the icosahedron, and the Rhombic Triacontahedron.

Vertex
Symbol
Wythoff
Symbol
No. of
Vertices
No. of
Edges
{4}
Faces
{6}
Faces
{10}
Faces
Symmetry
Group
Dual Polyhedron
4.6.10 2 3 5 | 120 180 30 20 12 A5×C2 Hexakis Icosahedron
Edge
Inter-Radius
= root2 tan18°
root3
  Edge
Circum-Radius
= 2root(31 – 12root5)
root241
Edge
Icosahedral Edge
= root5 – 1
6
  Edge
Dodecahedral Edge
= 1 + root5
10
  Edge
Long Rhombic Diagonal
= 7 – root5
22