document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=134938>Question 134938</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0395977223/algebrahomeworkh>Algebra Structure and Method </A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> I have been struggling on this math problem for awhile now and I was wondering if anyone could help me?  It has a picture with it, so I am going to describe the picture as best as I can!! I would deeply appreciate it!!  Please and Thank you!!\r<BR>\n" );
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document.write( "Area Problems<BR>\n" );
document.write( "solve.<BR>\n" );
document.write( "The area of a circle of a radius r is given by the formula a=pier^2.  Use this fact to find a formula for the shaded area in the figure below.<BR>\n" );
document.write( "The figure is a big circle with a small circle in side of it.  The radius is inside the small circle.  The width is in the big circle. radius=r and width=w<BR>\n" );
document.write( "The shaded region is the big circle.\r<BR>\n" );
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document.write( "I don't know if this helps at all, but I am hoping someone could help me!! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #98845 by </B><A HREF=/tutors/aboutme.mpl?userid=rajagopalan><B>rajagopalan(174)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rajagopalan><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=rajagopalan><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=98845\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> It seems  the problem of finding area of shaded portion of circle in a circle.<BR>\n" );
document.write( "Area of big circle =pi(w)^2/4<BR>\n" );
document.write( "Area of small circle=pi(r)^2<BR>\n" );
document.write( "Shaded area = Area of Big Circle - area of small circle<BR>\n" );
document.write( "=pi(w/2)^2-(r)^2)<BR>\n" );
document.write( "=pi(w/2 + r)(w/2 - r)<BR>\n" );
document.write( "in a nut shell pi times product of sum and difference of radii<BR>\n" );
document.write( "Answer:<BR>\n" );
document.write( "Shaded Area =pi(w/2 + r)(w/2 - r)<BR>\n" );
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