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18 October, 14:58

Whats the circumference of a circle with a radius of 21 meters

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Answers (2)
  1. 18 October, 15:16
    0
    C = 131.88 meters

    Step-by-step explanation:

    The circumference of a circle is given by

    C = 2*pi*r

    where r is the radius

    C = 2 * pi * 21

    C = 42 pi

    If we approximate pi by 3.14

    C = 42 (3.14)

    C = 131.88 meters
  2. 18 October, 18:21
    0
    131.88 m^2

    Step-by-step explanation:

    Circumference formula: 2pi * radius

    2 * 3.14 = 6.28

    6.28 * 21 = 131.88
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