## Prealgebra (7th Edition)

The area of the trapezoid is equal to $\frac{1}{2}$ $\times$ (b + B) $\times$ h Area = $\frac{1}{2}$ $\times$ (5 ft + 10 ft) $\times$ 3 ft Area = $\frac{1}{2}$ $\times$ (15 ft) $\times$ 3 ft Area = 22.5 square ft