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Question

In the given figure, ABCD is a square each of whose sides measures 28 cm. Find the area of the shaded region.

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Solution

Let r be the radius of the circle.
Thus, we have:
r=282 cm
=14 cm
Now,
Area of the shaded region = (Area of the square ABCD) - 4(Area of the sector where r=14 cm and θ=90°)
=28×28-4227×14×14×90360 cm2=784-4154 cm2=784-616 cm2=168 cm2

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