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(a) In the figure (i) given below, AOBC is a quadrant of a circle of radius 10m. Calculate the area of the

shaded portion. Take π = 3.14 and give your answer correct to two significant figures.

(b) In the figure (ii) given below, OAB is a quadrant of a circle. The radius OA = 3.5 cm and OD = 2 cm.

Calculate the area of the shaded portion.

Answer:

When it comes to circles, a quarter of a circle is referred to as a quadrant, which is a 90-degree sector. When four of these quadrants are brought together, the only structure that remains is a circle.

(a) In the figure

Shaded portion = Quadrant - △AOB

The radius of the quadrant = 10 m

Here

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