Question

The radius of a sector of a circle is 7 cm. If the measure of the arc of the sector is 210^°,  find the area of the sector in case.

Answer 1

The radius of the sector of the circle, r = 7 cm

 Measure of arc (θ) = 210^°

∴ Area of the sector = `"θ"/360 × πr^2`

`= 210/360 × 22/7 × (7)^2`

`= 7/12 × 22 × 7`

`= 7/6 × 11 × 7`

= 89.83 cm²