Pentagonal rotunda
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| Pentagonal rotunda | |
|---|---|
 |
|
| Type | Johnson J5 - J6 - J7 |
| Faces | 2.5 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 |
| Dual | - |
| Properties | convex |
In geometry, the pentagonal rotunda is one of the Johnson solids (J6). It can be seen as half an icosidodecahedron.
The 92 Johnson solids were named and described by Norman Johnson in 1966.
