If 0 is a centre of the circle, find the area of the shaded portion :
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The area of shaded portion is 50.2857143
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AB=8 cm
Since , o is centre of circle
Therefore, AO =4cm
And BO=4cm
R= 4/2=2cm
Area of shaded portion= area of 2 semi circle
= 2×22×2×2/7×2
=88/7 cm^2
Since , o is centre of circle
Therefore, AO =4cm
And BO=4cm
R= 4/2=2cm
Area of shaded portion= area of 2 semi circle
= 2×22×2×2/7×2
=88/7 cm^2
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