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One-Mouth Theorem

Except for convex polygons, every Simple Polygon has at least one Mouth.

See also Mouth, Principal Vertex, Two-Ears Theorem


References

Toussaint, G. ``Anthropomorphic Polygons.'' Amer. Math. Monthly 122, 31-35, 1991.




© 1996-9 Eric W. Weisstein
1999-05-26