1.) A 20° sector in a circle has an area of 21.5π yd².

What is the area of the circle?

Use 3.14 for pi.

2.) What is the area of a sector with a central angle of 3π/5 radians and a diameter of 21.2 cm?

Use 3.14 for π and round your final answer to the nearest hundredth.

1. Given that a sector of 20° has the area of 21.5π yd², the area of the circle will be found using proportionality

Area = (360) / (20) * 21.5π

=387π yd²

=387 (3.14)

=1215.18 yd²

2. Area=πr²

π=3.14

r=21.2/2=10.6 cm

hence

A=3.14 (10.6) ² (3/5*180) / 360

A=352.8104*0.6

A=211.686 cm²