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what is the area of a circle with a radius of 8 centimeters

Guest Apr 7, 2017
 #1
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what is the area of a circle with a radius of 8 centimeters

 

\(\begin{array}{|rcll|} \hline A &=& \pi r^2 \quad & | \quad r = 8\ cm \\ &=& \pi 8^2 \ cm^2 \\ &=& 64 \pi \ cm^2 \quad & | \quad \pi = 3.14159265359\ldots \\ &=& 201.061929830 \ cm^2 \\ \hline \end{array}\)

 

laugh

heureka  Apr 7, 2017
 #2
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8*8 = 64 * 3.14

tertre  Apr 7, 2017

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