[tex]__________________________[/tex]
The figure is a trapezoid therefore we should use the formula a + b/2 × h
[tex]\sf \large A = \frac{(a \: + \: b)}{2} \: h[/tex]
[tex]\sf \large A = \frac{(15 \: cm \: + \: 7 \: cm)}{2} \: (8 \: cm)[/tex]
[tex]\sf \large A = \frac{22}{2} \: (8 \: cm)[/tex]
[tex]\sf \large A = (11) (8 \: cm)[/tex]
[tex]\sf \large A = \boxed{ \sf 88 \: cm ^{2} }[/tex]
↬ Therefore, the area of the trapezoid is 88 cm^2