Question

the central angle of a sector of a circle is 2/7 radian and its radius is 7 cm. what is its area in Sq.cm?

Answer 1

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2/7 radian 

Area of sector= {(angle of sector)/2π}π r2
= {(2/7)/(22/7)}*π 7²
= (1/11)*(22/7)(49)=14 cm^2

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