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Just use the Pythagorean Theorem. A^2+B^2=C^2. Let the shortest side be have length A=x. Then the next shortest is B=(x+3), and the hypotenuse is C=(x+6). Insert these into the equation, and solve for x. You will get x=9 (or, x=-3, which you can throw out, because it doesn't make sense). So, the three side lengths are 9 cm, 12 cm, and 15 cm

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Q: The difference between the length of the hypotenuse and the length of the next longest side of a right triangle is 3cm The difference between the lengths of the two perpendicular sidesis3cm3lengths?
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