Simple Polyhedron

A Simple Polyhedron

Now first we must remember the formula: V - E + F = 2

Now let us look at V. V is the number of vertices, shown below:

So V = 9

Now let us look at E. E is the number of edges, shown below:

So E = 18

Now let us look at F. F is the number of faces, shown below:

This is a close up of eight of the faces

And here are the other three

So the number of F = 11

To finish up we should plug back into the formula: V - E + F = 2 and solve when V = 9, E = 18, and F = 11...we get 9 - 18 + 11 = 2. And this works