Q7 of 31 Page 181

Find the area of a quadrant of a circle whose circumference is 22 cm.

Given that circumference of the circle = 22 cm


We know that circumference of the circle = 2πr



⇒ r = 3.5cm


Quadrant of a circle is the one fourth part of a circle.


Also, the area of a circle = πr2


⇒ Area


Area of a quadrant


More from this chapter

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5

The length of the minute hand of a clock is 10.5 cm. Find area of the sector formed by the minute hand in 10 minutes.

6

A chord of a circle of radius 3.5 cm subtends an angle of 90° at the centre. Find the area of the minor segment of the circle.

8

The hour hand of a clock is 5 cm long. Find the area of the sector formed by the hour hand in 7 minutes.

 9

In figure, ABCD is a rectangle. The side AB = 10 cm and BC = 7 cm. From each vertex of the rectangle, are of radii 3.5 cm are drawn. Find the shaded region.