Question

what is the area? square kilometers

Explanation:

Step1: Recall trapezoid area formula

$A=\frac{(a + b)h}{2}$, where $a$ and $b$ are the lengths of the parallel - sides and $h$ is the height.

Step2: Identify values from the figure

Let $a = 5$ km, $b = 8$ km, and $h = 5$ km.

Step3: Substitute values into the formula

$A=\frac{(5 + 8)\times5}{2}=\frac{13\times5}{2}=\frac{65}{2}= 32.5$ square kilometers.

Answer:

$32.5$