Question

Work out the perimeter of this semicircle. Take the π to be 3.142

Answer 1

Step-by-step explanation:

Area of semicircle

$perimeter \: of \: semicircle = \frac{1}{2} \times \times2 \times pi \times radius + diameter$

$here \: r=5cm \: and \: \pi = 3.142 \\ therefore \: perimeter \: of \: semicircle \\ = \frac{1}{2} \times 2 \times 3.142 \times 5 + 10 \\ = 15.71 + 10 \\ = 25.71cm \\ \\ hence \: 25.71cm \: is \: the \: \\ perimeter \\ \: of \: the \: given \: semicircle$

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