Question

A circle with an area 9pi has a sector with a central angle of 1/9pi what is the area of the sector

Answer 1

½pi or 0.5pi units²

Explanation:

Area : angle

9pi : 2pi

x : pi/9

9pi/2pi = x/(pi/9)

4.5 × pi/9 = x

x = ½pi or 0.5pi units²