Supriya Ghosh (Editor)

Parabidiminished rhombicosidodecahedron

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Edges
  
90

Symmetry group
  
D5d

Vertices
  
50

Parabidiminished rhombicosidodecahedron

Type
  
Johnson J79 - J80 - J81

Faces
  
10 triangles 2x10 squares 10 pentagons 2 decagons

Vertex configuration
  
20(4.5.10) 10+20(3.4.5.4)

In geometry, the parabidiminished rhombicosidodecahedron is one of the Johnson solids (J80).

A Johnson solid is one of 92 strictly convex polyhedra that have regular faces but are not uniform (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.

It can be constructed as a rhombicosidodecahedron with two opposing pentagonal cupolae removed. Related Johnson solids are the diminished rhombicosidodecahedron (J76) where one cupola is removed, the metabidiminished rhombicosidodecahedron (J81) where two non-opposing cupolae are removed and the tridiminished rhombicosidodecahedron (J83) where three cupolae are removed.

References

Parabidiminished rhombicosidodecahedron Wikipedia