Question

Find the area and perimeter of the following sector :

Radius= 6 cm, angle at the centre is 70° 

Answer 1

Area of the sector = `pi "r"^2 xx theta/360^circ`

`= 22/7 xx 6 xx 6 xx 70^circ/360^circ`

= 22 cm²

Perimeter of the sector = `2"r" + (2 pi "r" xx theta/360^circ)`

`= 2 xx 6 + (2 xx 22/7 xx 6 xx 70^circ/360^circ)`

= 12 + 7.33

= 19.33 cm

Area of the sector = 22 cm² and perimeter = 19. 33 cm