Step-by-step explanation:
an isoceles triangle means that both legs are equally long.
the perimeter of a triangle is the sum of all 3 sides (the way to walk around the whole triangle).
the baseline is x long.
both legs are 3x - 2 long.
the perimeter
52 = x + 2×(3x - 2) = x + 6x - 4 = 7x - 4
56 = 7x
x = 8
