Question 12:
In the given figure, OACB is a quadrant of circle with centre O and radius 3.5 cm. If OD = 2 cm, find the area of the
(i) Quadrant OACB (ii) Shaded region [Use π = 22/7]
Answer:
(i) Since OACB is a quadrant, it will subtend 90° angle at O.
Area of quadrant OACB = (90°/360°) × πr2
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