Q2 of 31 Page 181

A sector of a circle of radius 10.5 cm contains an angle of 45°. Find the area of the minor sector.

Given: Radius of the circle = 10.5 cm and angle subtended by the arc = 45°


We know that the area of the minor sector


⇒ Area of the minor sector


⇒ Area of the minor sector = 43.3125 cm2


More from this chapter

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10

The radii of two concentric circles are 4 cm and 3 cm respectively. The area enclosed by the two circles is:

 1

In a circle of radius 7 cm, an arc subtends an angle of 60° at the centre. Find the length of the arc.

 3

The length of an arc of a circle of radius 7 cm is 12 cm. Find the area of the minor sector.

 4

In a circle of radius 21 cm, an arc subtends an angle of 60° at the centre. Find:

(i) The length of the arc.


(ii) Area of the sector formed by the arc.


(iii) Area of the segment formed by the corresponding chord.