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Posted by on Monday, September 7, 2009 at 7:28pm.

What's the circumference of a circle whose area equals 20x 3.14 cm squared in centimeters?

  • geometry - , Monday, September 7, 2009 at 7:31pm

    C = pi * d

    A = pi * r^2

    The radius must be 20 cm, so the diameter is 40 cm.

    C = 3.14 * 40

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