Elongated triangular cupola
|Elongated triangular cupola|
J17 - J18 - J19
In geometry, the elongated triangular cupola is one of the Johnson solids (J18). As the name suggests, it can be constructed by elongating a triangular cupola (J3) by attaching a hexagonal prism to its base.
A Johnson solid is one of 92 strictly convex regular-faced polyhedra, but which is not uniform, i.e., not a Platonic solid, Archimedean solid, prism or antiprism. They are named by Norman Johnson who first enumerated the set in 1966.
The dual of the elongated triangular cupola has 15 faces: 6 isosceles triangles, 3 rhombi, and 6 quadrilaterals.
|Dual elongated triangular cupola||Net of dual|
- Weisstein, Eric W., "Johnson solid", MathWorld.
- Weisstein, Eric W., "Elongated triangular cupola", MathWorld.
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