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Areas Related To Circles

Question 13:

In the given figure, a square OABC is inscribed in a quadrant OPBQ. If OA = 20 cm, find the area of the shaded region. [Use π = 3.14]

Answer:

In ΔOAB,

OB2 = OA2 + AB2

= (20)2 + (20)2

Radius (r) of circle

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