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hi how r u

 May 8, 2014

Best Answer 

 #2
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$$r*U = r*(2*\pi *r)=2*\pi*r^2=2*(\pi*r^2)=2*A\quad \quad U=2\pi r$$

$$\boxed{rU=2A}$$

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 May 8, 2014
 #1
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Well, I just woke up and I have a hands-on test in Biology in a little over an hour, so right now I'm kinda out of it.

 May 8, 2014
 #2
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+3
Best Answer

$$r*U = r*(2*\pi *r)=2*\pi*r^2=2*(\pi*r^2)=2*A\quad \quad U=2\pi r$$

$$\boxed{rU=2A}$$

Guest May 8, 2014
 #3
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not the greatest... i have to take a test tomorrow (Friday) in math and english.  

 May 8, 2014

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