SOLUTION: how many diagonals does a 34-gon have?

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Question 428067: how many diagonals does a 34-gon have?
Answer by nerdybill(7384) About Me  (Show Source):
You can put this solution on YOUR website!
Given an n-gon:
then the number of diagnonals are
[n(n-3)]/2
.
your problem,
n=34
[34(34-3)]/2
[34(31)]/2
[17(31)]
527