Answers

2015-12-13T14:11:01+08:00
Use the formula A= \pi  r^{2} ,Then rearrange it to find the diameter
r= \sqrt{ \frac{A}{ \pi } }  , finalli multiply it by two because, the radius is half the diameter.
 
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2015-12-13T17:12:23+08:00
Use the derived formula r=√Area/π
And then multiply the radius by 2 to get the diameter.
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