SOLUTION: the truss in the illustration in the form of an isosceles triangle each of the two equal sides is 3 feet less than the third side if the perimeter is 51 feet find the length of eac

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x + (x-3) + (x-3) = 51


3x - 6 = 51


3x = 51 + 6 = 57


x =  = 19.


The sides are 19 ft, 16 ft and 16 ft.