Let G be a graph with the following properties: G is simple, connected and planar. Every vertex of G has a degree of 4. Every face of G has three edges and every edge of G belongs to two faces. Does such a graph exist? If so, how many vertices, edges and faces does it have? (Hint: Turn each of the above property into an equation about the number of vertices, edges and/or faces of the graph.)

Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter9: Systems Of Linear Equations
Section9.5: Multiplication With The Addition-or-subtraction Method
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Let G be a graph with the following properties:

  • G is simple, connected and planar.
  • Every vertex of G has a degree of 4.
  • Every face of G has three edges and every edge of G belongs to two faces.

Does such a graph exist? If so, how many vertices, edges and faces does it have?

(Hint: Turn each of the above property into an equation about the number of vertices, edges and/or faces of the graph.)

 

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