<PRE><B>Question 491952</B>
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.</PRE>