document.write( "Question 211734: What is the the shaded area of a 17m and 22m circle (this is radius) \n" ); document.write( "
Algebra.Com's Answer #160003 by RAY100(1637)\"\" \"About 
You can put this solution on YOUR website!
Area of circle = pi * radius ^2
\n" ); document.write( ".
\n" ); document.write( "If shaded area is difference of two inscribed circles,
\n" ); document.write( ".
\n" ); document.write( "Difference of Area = Area of larger - Area of smaller
\n" ); document.write( ".
\n" ); document.write( "A(d) = pi * R^2 -pi * r^2
\n" ); document.write( ".
\n" ); document.write( "A(d) =pi(R^2-r^2)
\n" ); document.write( ".
\n" ); document.write( "in this case , R=22, r=17
\n" ); document.write( ".
\n" ); document.write( "a(d) = pi*(22^2-17^2) = pi * 195 = 612.61
\n" ); document.write( ".
\n" ); document.write( "check,,,A(22) = 1520.53,,,A(17) = 907.92,,,,difference is 612.61,,,,ok
\n" ); document.write( ".
\n" ); document.write( "
\n" );