Triangular 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 = 4

 

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

 

So E = 6

 

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

 

This is a close up of two of the faces

 

And here are the other two

 

So the number of F = 4

 

To finish up we should plug back into the formula: V - E + F = 2 and solve when V = 4, E = 6, and F = 4...we get 4 - 6 + 4 = 2. And this works

 

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