Rhombicosacron
Introduction In geometry, the '''rhombicosacron''' (or '''midly dipteral ditriacontahedron''') is a nonconvex isohedral polyhedron. It is the dual of the uniform rhombicosahedron, U56.It has 50 vertices, 120 edges, and 60 crossed-quadrilateral faces.
Proportions Each face has two angles of  and two angles of . The diagonals of each antiparallelogram  intersect at an angle of . The dihedral angle equals . The ratio between the lengths of the long edges and the short ones equals , which is the square of the golden ratio.
References *
External links * *  Uniform polyhedra and duals