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24 September, 03:56

What is the circumference of a circle that ha a diameter of 60cm?

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Answers (2)
  1. 24 September, 04:45
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    The equation is 2 (pi) R and the radius is 30 because it's 1/2 the diameter and 30 x (pi) is 92.2 (x2) is 188.4

    The circumference is 188.4cm
  2. 24 September, 06:39
    0
    So the equation of the circumference is 2 (pi) times r and diamater is 2 times of radius so 60/2=30

    put it into the equation

    2 (pi) r=

    (just for fun, you could have just put in pi times 60 since 60/2 times 2=60)

    pi times 60=3/14159 ... times 60 or = 188.496 cm is the circumference

    the area formula is pi times r^2 and the circumference formula is 2pi time r
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