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October 20th, 2012, 11:38 PM  #1 
Newbie Joined: Oct 2012 Posts: 1 Thanks: 0  find area of two circle
how to find area which is yellow if the radius of big circle is rb and radius of the small circle is rs. the explanation of picture is in attachment

October 20th, 2012, 11:49 PM  #2 
Senior Member Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,211 Thanks: 520 Math Focus: Calculus/ODEs  Re: find area of two circle 

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