B b' C h A D b FIGURE 3.6. Trapezoid ABCD. Theorem 74. The area of a trapezoid with height h and parallel sides of lengths b and b' is given by Area = (b+b')h/2.
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The area of a trapezoid is given by $A=\frac{1}{2}\left(b_{1}+b_{2}\right) h,$ where $b_{1}$ and $b_{2}$ are the lengths of the two parallel sides and $h$ is the height. A window is in the shape of a trapezoid. Find the area of the trapezoid with dimensions shown in the figure. (FIGURES CAN'T COPY)
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