## Prealgebra (7th Edition)

This is a quadrilateral which has two parallel sides, therefore this is a trapezoid. The area of the trapezoid can be calculated as: $T=m\times \frac{a+c}{2}$, where m is the height and $a$ and $c$ are the parallel sides. Here: $T=10\times \frac{12+36}{2}=240$ square feet.