Retrograde pentagonal cuploid

The pentagonal cuploid, also called the retrograde pentagonal semicupola or rapescu, is an orbiform polyhedron. It consists of 5 triangles, 5 squares, and 1 pentagon. It is a cuploid based on the pentagon seen as {5/4}, with a pseudo {10/4} base.

Related polyhedra
The pentagonal cuploid can be edge-inscribed in sidtid; it uses triangles and pentagons of gidtid as well as squares of rhom.