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Question

The area of the shaded region in the figure given below is:


A

r2(π2)

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B

r22(π2)

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C

r22(π1)

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D

r2(π21)

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Solution

The correct option is B

r22(π2)


Given,radius of the circularfigure=r
Area of the semicircle=πr22
InΔABC
CA=2r
OB=r
Area ofΔABC=12(CA)(OB)=12(2r)(r)=r2
Area of the shaded region = Area of semi–circle - Area of ΔABC
=πr22r2=r2(π21) = r22(π2)


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