Principal Vertex
A Vertex 
of a Simple Polygon 
is a principal Vertex if thediagonal 
intersects the boundary of only at 
and 
.
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 98, 31-35, 1991.
- Colunar Triangle
- Comb Function
- Combination
- Combination Lock
- Combinatorial Species
- Combinatorial Topology
- Combinatorics
- Comma Derivative
- Comma of Didymus
- Comma of Pythagoras
- Common Cycloid
- Common Residue
- Commutation Coefficient
- Commutative
- Commutative Algebra
- Commutator
- Compact Group
- Compact Manifold
- Compactness Theorem
- Compact Set
- Compact Space
- Compact Surface
- Companion Knot
- Comparability Graph
- Comparison Test