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Today, 13:55

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

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Answers (2)
  1. Today, 14:46
    0
    D is the final answer
  2. Today, 15:02
    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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