Great deltoidal icositetrahedron
In geometry, the great deltoidal icositetrahedron is the dual of the nonconvex great rhombicuboctahedron. Its faces are darts. Part of each dart lies inside the solid, hence is invisible in solid models.Proportions
Faces have three angles of and one of. Its dihedral angles equal. The ratio between the lengths of the long edges and the short ones equals.
