Trigonal trapezohedron
In geometry, a trigonal trapezohedron is a rhombohedron (a polyhedron with six rhombus-shaped faces) in which, additionally, all six faces are congruent. Alternative names for the same shape are the trigonal deltohedron or isohedral rhombohedron. Some sources just call them rhombohedra.
| Trigonal trapezohedron | |
|---|---|
| Type | trapezohedron |
| Conway notation | dA3 |
| Coxeter diagram | |
| Faces | 6 rhombi |
| Edges | 12 |
| Vertices | 8 |
| Face configuration | 3,3,3,3 |
| Symmetry group | D3d, [2+,6], (2*3), order 12 |
| Rotation group | D3, [2,3]+, (223), order 6 |
| Dual polyhedron | trigonal antiprism |
| Properties | convex, equilateral polygon, face-transitive, zonohedron, parallelohedron |
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