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Question
A sector of circle of radius 4cm contains an angle of 30°. Find the area of sector
Sum
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Solution
Radius = 4 cm = r
Angle subtended at centre = 𝜃 = 30°
Area of sector (shaded region)
=`theta/360^@× pir^2`
=`30/360×22/7`× 4 × 4
=`88/21cm^2`
∴ 𝑎𝑟𝑒𝑎 𝑜𝑓 𝑟𝑒𝑞𝑢𝑖𝑟𝑒𝑑 𝑠𝑒𝑐𝑡𝑜𝑟 =`88/21cm^2`
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