Question

Radius of a sector of a circle is 21cm . If length of arc of that sector is 55 cm , find the area of sector .

Answer 1

Answer:

Area of the sector is 577.49 sq. cm.

Step-by-step explanation:

The length of arc, S = rθ

where θ is in radians.

θ = arc length/radius = 55/21 = 2.619

Area of sector = (θ/2) * r²

                        =(2.619/2) * 21²

                         = 577.4895

                         = 577.49 cm²

Answer 2

see the attachment.............