High Quality Content by WIKIPEDIA articles! In computational geometry, polygon triangulation is the decomposition of a polygon into a set of triangles. A triangulation of a polygon P is its partition into non-overlapping triangles whose union is P. In the strict sense, these triangles may have vertices only at the vertices of P. In a less strict sense, points can be added anywhere on or inside the polygon to serve as vertices of triangles. Triangulations are special cases of planar straight-line graphs. A convex polygon is trivial to triangulate in linear time, by adding edges from one vertex to all other vertices.