Answer:
the shorter leg = 9mm
the longer leg = 12mm
the hypotenuse is 15mm
Explanation:
x^2 +(x+3)^2 =(x+6)^2
x^2 + x^2 + 6x +9=x^2 + 12x +36
x^2-6x-27=0
(x+3)(3-9)=0
x=-3 (impossible) ... or x=9
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