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treviousmerritt

Answer:look at the picture for the answer

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It is 9 you draw a triangle with those measurements and use the Pythagorean theorem. A^2+b^2=c^2 so 12^2+b^2=15^2 so 144+b^2=225 then 144-225=81 then un square you get 9 don’t forget to label

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