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12 March, 23:51

What is the circumference of a circle if the radius is 13?

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Answers (2)
  1. 13 March, 00:00
    0
    C=2πr=2·π·13≈81.68141

    C=81.68
  2. 13 March, 00:20
    0
    Circumference is = 2πr r=13 2π13 = 26π ≈ 81.681
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