Question

please give me the answer with explanations, don't write only the answer, explain it by process.​

Answer 1

A᭄nswer:-

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Step-by-step explanation:

$given \\ area \: of \: shaded \: portion = 9 \: sq.cm \\ base \: of \: triangle = 3cm \\ now \: area \: of \: triangle = 9 \\ = > 9 = \frac{1}{2} \times 3 \times h \\ = > h = \frac{18}{3} \\ = > h = 6 \\ area \: of \: parallelogram = \\ base \times hight \\ bc \times h \\ = > (3 + 4) \times 6 \\ = > 7 \times 6 \\ = > 42 {cm}^{2}$