Education, Mathematics, Math, Science, Technology.
Given a planar graph G=(V,E) and faces F,|V|-|E|+|F|=2. In the above theorem or formula, |V|, |E|, and |F| denote the number of vertices, edges, and faces of the graph G respectively. No matter how a planar graph is drawn, any edge or vertices can be moved as long as no 2 edges cross, the