Question

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

Answer 1

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`