To find the height of this trapezoid, you would write an equation: 8232 = (B1+B2) times 1/2 times h. First of, solve the parenthesis. 119 plus 105 equals 224. the divide by two. 224 divided by 2 equals 112. Then, simplify. 8232 = 112 times h. Divide by 112 on both sides. You get 73.5 = h. The height is h.