## Geometry: Common Core (15th Edition)

42,900 $mi^{2}$
We use the formula for the area of a trapezoid to obtain: A=$\frac{1}{2}$h($b_{1}$+$b_{2}$) A=$\frac{1}{2}$(10)(340+440) A=$\frac{1}{2}$(110)(780) A=42,900