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29 January, 18:35

The radius of a circular mirror is 4 centimeters. What is the circumference of the mirror? Tell you what value you used for pi

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  1. 29 January, 18:52
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    4*2*3.14?

    ans = 25.12
  2. 29 January, 19:26
    0
    The equation of circumference is C=pi*d (d=diameter)

    If the radius is 4, then the diameter is twice that or 8

    If you use 3.14 for pi, you do:

    C=3.14*8

    C=25.1 rounded to the nearest tenth
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