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5 October, 22:57

Find the radius of a circle whose circumference is 31.4 centimeters. Approximate Π as 3.14.

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Answers (2)
  1. 5 October, 23:02
    0
    Circumference is Diameter * 3.14

    so D * 3.14 = 31.4

    31.4 / 3.14 = 10 so the diameter is 10.

    the radius is half of the diameter so radius = 5 centimeters.
  2. 5 October, 23:11
    0
    (31.4/3.14) / 2=5 because π=circumference/diameter
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