Answer:
73.5 [tex]cm^{2}[/tex]
Step-by-step explanation:
The shaded area is in the shape of a trapezoid, so to find the area all we have to do is use the formula
[tex]A = \frac{a + b}{2} h[/tex] , where h is height, a is base 1, and b is base 2.
Plugging in the values, work on solving this equation:
[tex]A = \frac{(9) + (12)}{2}(7)[/tex]
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We should be left with
[tex]A = \frac{21}{2}(7) = 10.5 (7) = 73.5 cm^{2}[/tex]
