Circle plus triangle = 43 circle plus square = 37 triangle + square = 40 circle, triangle, square

Circle plus triangle = 43 circle plus square = 37 triangle + square = 40 circle, triangle, square

Total = (43 + 37 + 40) △ 2 = 60
Circle = 60-40 = 20
Triangle = 60-37 = 23
Square = 60-43 = 17