SOLUTION: How many diagonals are there in a regular polygon of n sides?

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Question 491952: How many diagonals are there in a regular polygon of n sides?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
How many diagonals are there in a regular polygon of n sides?
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There are n vertices
# of line segments determined is nC2 = (n/2)(n-1)
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n of those line segments are sides of the polygon
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Ans: There are (n/2)(n-1) - n diagonals
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Cheers,
Stan H.