Triangular antipodium

The triangular antipodium or trapo is a variant of the triangular antiprism where the bases are different sized equilateral triangles. The version with all equal edges is the regular octahedron, one of the Platonic solids, but other versions exist with isosceles triangles as the sides. In the latter case its Coxeter diagram could be given as xo3oy&#z.

In vertex figures
5 uniform polychora have triangular antipodiums for vertex figures, including the convex small disprismatotesseractihexadecachoron and small disprismatohexacosihecatonicosachoron, as well as the nonconvex small disprismatodishecatonicosachoron, small dishexacosidishecatonicosachoron, and great hexacosihecatonicosidishecatonicosachoron.