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Find the area of a sector of a circle with radius 6 cm if angle of the sector is $60^o$.
Given:
Radius of the circle $=6\ cm$.
Angle subtended by the sector $=60^o$
To do:
We have to find the area of the sector.
Solution:
Area of the sector subtending $\theta$ at the centre $=\pi r^{2} \times \frac{\theta}{360^{\circ}}$
Therefore,
Area of the given sector $=\pi(6)^{2} \times \frac{60^{\circ}}{360^{\circ}} \mathrm{cm}^{2}$
$=36 \pi \times \frac{1}{6} \mathrm{~cm}^{2}$
$=6\pi \mathrm{cm}^{2}$
The area of the sector is $6\pi \mathrm{cm}^{2}$.
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