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Dehn Invariant

An invariant defined using the angles of a 3-D Polyhedron. It remains constant under solid Dissection and reassembly. However, solids with the same volume can have different Dehn invariants. Two Polyhedra can be dissected into each other only if they have the same volume and the same Dehn invariant.

See also Dissection, Ehrhart Polynomial

© 1996-9 Eric W. Weisstein