Whats the Fastest Way??
Geometry
Level
3
In Figure ABCD is rectangle of 20cm into 10cm .A semicircle is drawn with center at O and radius(10root 2)cm and it passes through A and B. Find the
area of the shaded region in the given figure
NOTE :use pie as 3.14
The answer is 143.
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1 solution
Angle AOB=90 Area of sector =157 Area of triangle AOB =100 =>area of minor sector = 157-100=57 Area of rectangle = 200 Area of shaded region.= 200-57. =143 Therefore,the area of shaded region = 143sq cm