Question

6
20 km.
14 km.
11 km.
37 km.
9
10 in.
9 in.
7 in.
17 in.

Explanation:

Step1: Calculate area of figure 6

Formula for trapezoid area: $\frac{1}{2} \times (a + b) \times h$, where $a=20$, $b=37$, $h=11$
$\frac{1}{2} \times (20 + 37) \times 11 = \frac{1}{2} \times 57 \times 11 = 313.5$

Step2: Calculate area of figure 9

Use same trapezoid formula, where $a=10$, $b=17$, $h=7$
$\frac{1}{2} \times (10 + 17) \times 7 = \frac{1}{2} \times 27 \times 7 = 94.5$

Answer:

Area of figure 6: $313.5$ km²
Area of figure 9: $94.5$ in²