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Question

Find the area of the shaded region shown in the given figure. The four corners are circle quadrants, and at the centre, there is a circle.

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Solution

Area of the square = (Side)2
=42=16 cm2

Area of the circle = πr2
Radius = 1 cm
Area = 3.14×(1)2=3.14 cm2

Area of the quadrant of one circle = 14πr2
=14×3.14×12=0.785 cm2

Area of the quadrants of four circles = 0.785×4 = 3.14 cm2
Area of the shaded region = Area of the square - Area of the circle - Area of the quadrants of four circles
=16-3.14-3.14=9.72 cm2

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