Parabigyrate rhombicosidodecahedron

In geometry, the parabigyrate rhombicosidodecahedron is one of the Johnson solids (J73). It can be constructed as a rhombicosidodecahedron with two opposing pentagonal cupolae rotated through 36 degrees. It is also a canonical polyhedron.

Parabigyrate rhombicosidodecahedron
TypeJohnson
J72J73J74
Faces2x10 triangles
3x10 squares
2+10 pentagons
Edges120
Vertices60
Vertex configuration20(3.42.5)
2x10+20(3.4.5.4)
Symmetry groupD5d
Dual polyhedron-
Propertiesconvex, canonical
Net

A Johnson solid is one of 92 strictly convex polyhedra that is composed of regular polygon faces but are not uniform polyhedra (that is, they are not Platonic solids, Archimedean solids, prisms, or antiprisms). They were named by Norman Johnson, who first listed these polyhedra in 1966.[1]

Alternative Johnson solids, constructed by rotating different cupolae of a rhombicosidodecahedron, are:

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  1. ^ Johnson, Norman W. (1966), "Convex polyhedra with regular faces", Canadian Journal of Mathematics, 18: 169–200, doi:10.4153/cjm-1966-021-8, MR 0185507, Zbl 0132.14603.