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cube is a special case of a trigonal trapezohedron, since a square is a special case of a rhombus.

A gyroelongated triangular bipyramid constructed with equilateral triangles can also be seen as a trigonal trapezohedron when its coplanar triangles are merged into rhombi.

The two golden rhombohedra are the acute and obtuse form of the trigonal trapezohedron with golden rhombus faces.Copies of

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