Question

In a circle, a 90° sector has area 16π ft2. What is the radius of the circle?

Options:
a. 16 ft
b. 4 ft
c. 12 ft
d. 8 ft

Answer 1

8ft

Explanation:

Answer 2

sector area = 0.5 * r^2 * angle (in radians)

so:

16 pi = 0.5 * r^2 * (90*pi/180)

r^2 = 16 pi /(0.25 pi) = 64

r = 8


therefore it would be d