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21 May, 17:18

If the diameter of a circle is 9 cm, then its circumference is 56.52 cm.

True or false?

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Answers (1)
  1. 21 May, 18:30
    0
    Circumference

    2*pi*r

    2 * (22/7) * (9/2)

    2 * (11/7) * 9

    198 / 7

    28.28 cm

    so 56.52 is not correct
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