Pentagonal rotunda
6th Johnson solid (17 faces) / From Wikipedia, the free encyclopedia
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In geometry, the pentagonal rotunda is one of the Johnson solids (J6). It can be seen as half of an icosidodecahedron, or as half of a pentagonal orthobirotunda. It has a total of 17 faces.
Quick Facts Type, Faces ...
Pentagonal rotunda | |
---|---|
Type | Johnson J5 – J6 – J7 |
Faces | 10 triangles 1+5 pentagons 1 decagon |
Edges | 35 |
Vertices | 20 |
Vertex configuration | 2.5(3.5.3.5) 10(3.5.10) |
Symmetry group | C5v |
Rotation group | C5, [5]+, (55) |
Dual polyhedron | - |
Properties | convex |
Net | |
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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]