Triangular duotruncatoprism

The triangular duotruncatoprism or tridtep is a convex isogonal polychoron and the first member of the duotruncatoprism family. It consists of 6 ditrigonal prisms, 9 rectangular trapezoprisms, 18 wedges, and 9 tetragonal disphenoids. 2 ditrigonal prisms, 2 rectangular trapezoprisms, 3 wedges, and 1 tetragonal disphenoid join at each vertex. It can be obtained as the convex hull of two orthogonal semi-uniform triangular-ditrigonal duoprisms whose ditrigonal prism cells have a smaller circumradius than their triangular prisms. However, it cannot be made uniform.