A Principal Vertex of a Simple Polygon is called an ear if the diagonal
that bridges lies entirely in . Two ears and are said to overlap if
See also Anthropomorphic Polygon, Mouth, Two-Ears Theorem
References
Meisters, G. H. ``Polygons Have Ears.'' Amer. Math. Monthly 82, 648-751, 1975.
Meisters, G. H. ``Principal Vertices, Exposed Points, and Ears.'' Amer. Math. Monthly 87,
284-285, 1980.
Toussaint, G. ``Anthropomorphic Polygons.'' Amer. Math. Monthly 122, 31-35, 1991.