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There is a pair of parallel sides in the following shape.

There is a pair of parallel sides in the following shape.-example-1

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Check the picture below.


\textit{area of a trapezoid}\\\\ A=\cfrac{h(a+b)}{2}~~ \begin{cases} h~~=height\\ a,b=\stackrel{parallel~sides}{bases~\hfill }\\[-0.5em] \hrulefill\\ a=7\\ b=3\\ h=3 \end{cases}\implies A=\cfrac{3(7+3)}{2}\implies A=15

There is a pair of parallel sides in the following shape.-example-1
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