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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

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References

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

Referenced on Wolfram|Alpha

One-Mouth Theorem

Cite this as:

Weisstein, Eric W. "One-Mouth Theorem." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/One-MouthTheorem.html

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