Elongated square cupola
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| Elongated square cupola | |
|---|---|
 |
|
| Type | Johnson J18 - J19 - J20 |
| Faces | 4 triangles 1+3.4 squares 1 octagon |
| Edges | 36 |
| Vertices | 20 |
| Vertex configuration | 8(42.8) 4+8(3.43) |
| Symmetry group | C4v |
| Dual | - |
| Properties | convex |
In geometry, the elongated square cupola is one of the Johnson solids (J19). As the name suggests, it can be constructed by elongating a square cupola (J4) by attaching an octagonal prism to its base. The solid can be seen as a rhombicuboctahedron with its "lid" (another square cupola) removed.
The 92 Johnson solids were named and described by Norman Johnson in 1966.
