Question

find the area of the shaded region in each of the following figures
​

Answer 1

Answer:

Area = 260cm² approximately

Step-by-step explanation:

radius of big circle = 21 / 2 cm

Area of circle = π r²

$\frac{22}{7} \times \frac{21}{2} \times \frac{21}{2} = 346.5$

Radius of semicircle circle = 10.5 / 2 cm

There are 2 semi circle which makes a complete circle

Area of circle = π r²

$\frac{22}{7} \times \frac{105}{20} \times \frac{105}{20} = 86.6 \: {cm}^{2}$

Area of shaded region =

ar of big circle - ar of small circle

346.5 - 86.6 = 259.9

Area of shaded region= 260 cm² approximately

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