Medial pentagonal hexecontahedron
Introduction In geometry, the '''medial pentagonal hexecontahedron''' is a nonconvex isohedral polyhedron. It is the dual of the snub dodecadodecahedron. It has 60 intersecting irregular pentagonal faces.
Proportions Denote the golden ratio by , and let  be the smallest (most negative) real zero of the polynomial  Then each face has three equal angles of  one of  and one of  Each face has one medium length edge, two short and two long ones. If the medium length is 2, then the short edges have length and the long edges have lengthThe dihedral angle equals  The other real zero of the polynomial  plays a similar role for the medial inverted pentagonal hexecontahedron.
References *
External links * *  Uniform polyhedra and duals