A sector with an area of 54 pi cm2 has a radius of 9 cm What is the central angle measure of the sector in radians?

Answer 1

sector area = 1/2 R^2 * central angle

54 PI = 1/2 * 81 * central angle

108 * PI/81 = central angle

(using PI = 3.14)

4.19 = central angle