Area of the circle is πr² which corresponds to an angle of 360° subtended at the center. Thus, the area of a sector subtending angle at the centre is:
In this case put $\theta$ equal to 30°
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Area of the circle is πr² which corresponds to an angle of 360° subtended at the center. Thus, the area of a sector subtending angle at the centre is:
In this case put $\theta$ equal to 30°