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math-PLEASE HELP

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Answer the following questions to determine why Euler’s
formula continues to hold for the polyhedron formed by
cutting corners off of an octahedron, :
a. For an octahedron V = , ____,F = ____, and E =
_____.
b. When you slice off one corner of the octahedron,
you (gain or lose) ____ vertices, (gain or lose) ____
faces, and (gain or lose) ____ edges.
c. Therefore, the total change in V is ____; the total
change in F is ____; and the total change in V + F is
____.
d. The total change in E is ____.
e. What does the comparison of the total change in V + F
to the total change in E tell you?

  • math-PLEASE HELP -

    In case you are not already familiar with the notations,
    V=number of vertices (corners) of the octahedron.
    F=number of faces
    E=number of edges

    The following link shows what happens when a corner of the octahedron is cut away. I'll let you complete the answers to the question.

    http://img204.imageshack.us/img204/5302/euler.jpg

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