Three triangles and two circles are equal to 72, two triangles and three circles are equal to 78?
Circle triangle = 78-72 = 6
Circle = (72 + 3 × 6) △ 5 = 18
Triangle = 18-6 = 12
Circle triangle = 78-72 = 6
Circle = (72 + 3 × 6) △ 5 = 18
Triangle = 18-6 = 12