SOLUTION: a convex n-gon has 5 times as many diagonals as sides. find the value of n

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Question 1000017: a convex n-gon has 5 times as many diagonals as sides. find the value of n
Answer by ikleyn(52831)   (Show Source): You can put this solution on YOUR website!
Your equation is 

 = .

Note that  is the number of diagonal of a convex n-gon.

Simplify this equation:

 = ,

 = .

The solution is n = 13.


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