Q2 of 64 Page 74

Find the radius of a sector of a circle having a central angle 70°and an arc length of 44 cm.

Given:

radius (r) = ? cm


Arc length = 44 cm


central angle = 70°


As we know,


Length of arc =





⇒ radius = 36cm


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2

Find the angle subtended by an arc 88 cm long at the centre of a circle of radius 42 cm.

 2

The arc length of a sector of a circle of radius 14 cm is 22 cm. Find its central angle.

 3

Find the area and perimeter of the sector with

radius 10 cm and arc length 33 cm.

 3

Find the area and perimeter of the sector with

radius 55 cm and arc length 80 cm.