Divide area of trapezoid into thirds?

To divide the area of a trapezoid into thirds, first calculate the total area using the formula ( A = \frac{1}{2} (b_1 + b_2) h ), where ( b_1 ) and ( b_2 ) are the lengths of the parallel sides and ( h ) is the height. Once you have the total area, divide it by three to find the area of each segment. You can then draw horizontal lines parallel to the bases at heights corresponding to these areas, adjusting for the varying widths of the trapezoid as you move up. This will create three sections, each with an equal area.