After some times, the points and their arc grow into many graph families.
Some graph family has special name depending on their characteristics.
One family of graph has characteristics that each pair of vertices is connected to one edge. These graph families are called Complete Graphs . If the number of vertices is denoted by then the complete graph always contain number of edges.
Teknomo, Kardi (2015) Pictorial Introduction to Graph Theory. http:\\people.revoledu.com\kardi\ tutorial\GraphTheory\