Question

Area of semi circle whose radius is 3.5cm

Answer 1

Area of semicircle
$\frac{\pi {r}^{2} }{2} \\ \frac{ \frac{22}{7} \times 3.5 \times 3.5}{2} \\ \frac{22 \times 0.5 \times 3.5}{2} \\ 19.25c {m}^{2}$


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Answer 2

area=πr^2/2
=22/7×3.5×3.5/2
=22×0.5×3.5/2
=38.5/2
=19.25cm^2.