3 years ago

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

1 answer:

7 0

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

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