If the perimeter is 39 what you have to do is 39 - 8.5 - 8.5 that will give you 22 and divide 22/2 and that gives you 11. So 11 is the length
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Step-by-step explanation:
Because it is a square root
13 its not hard aslo give n if not no one can figure it out
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what are the numbers
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