Great ditrigonal dodecacronic hexecontahedron

In geometry, the great ditrigonal dodecacronic hexecontahedron (or great lanceal trisicosahedron) is a nonconvex isohedral polyhedron.

It is the dual of the uniform great ditrigonal dodecicosidodecahedron.

Its faces are kites.

Part of each kite lies inside the solid, hence is invisible in solid models.

Kite faces have two angles of

arccos ⁡ (

arccos ⁡ ( −

Its dihedral angles equal

arccos ⁡ (

The ratio between the lengths of the long edges and the short ones equals

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