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January 30, 2015

January 30, 2015

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

- geometry -
**Ms. Sue**, Monday, September 7, 2009 at 7:31pmC = 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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