Great rhombidodecacron
Introduction 3D model of a great rhombidodecacronIn geometry, the '''great rhombidodecacron''' (or '''Great dipteral ditriacontahedron''') is a nonconvex isohedral polyhedron. It is the dual of the great rhombidodecahedron. It is visually identical to the great deltoidal hexecontahedron. Its faces are antiparallelograms.
Proportions Each antiparallelogram 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 golden ratio. Part of each face lies inside the solid, hence is invisible in solid models.
References * p. 88
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