A ver, lee el (los) link (s), en el primer link, el segundo párrafo empieza con algo así:
Cita: As example, you will get 3 points (vertices) for a triangle, and 4 points for quadrilaterals. So, you can identify any polygon by the number of vertices of that polygon. You can even identify features of polygons such as convexity, concavity, equilateral and etc by calculating and comparing distances between vertices.
Ya leíste todo el articulo?
Saludos
