Answer :

[tex]\frac{25}{65}=\frac{5}{x}\\ 25x=325\\ x=13[/tex]
Because they are similar, they have the same proportions. In the bigger polygon, the one side is 25in, and in the smaller one, the side is 5in.
25÷5=5
So, you have to divide 65 by 5 to get your answer. 
65÷5=13
13 inches is the answer

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