<PRE><B>Question 699232</B>
How many diagonals can be drawn from a vertex of an n-gon? 
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# of line segments joining 2 vertices = nC2 = [n(n-1)]/(2)
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# of those line segments that are sides of the n-gon: n
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Therefore, # of diagonals: nC2-n = [n(n-1)]/2 - n
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Cheers,
Stan H.
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