document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=257506>Question 257506</A>: <I><SPAN STYLE=\"word-break: break-all;\"> the perimeter of a semi-circle is doubled when the radius is increased by 6. Find the radius  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #189494 by </B><A HREF=/tutors/aboutme.mpl?userid=dabanfield><B>dabanfield(803)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=dabanfield><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=189494\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> the perimeter of a semi-circle is doubled when the radius is increased by 6. Find the radius \r<BR>\n" );
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document.write( "Let R be the radius of the circle. Note that 2*R is equal to the diameter.\r<BR>\n" );
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document.write( "Then the perimeter of the semi-cirle is [(2*R)*pi)]/2 = R*pi.\r<BR>\n" );
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document.write( "If we increase R by 6 the perimeter is doubled so:\r<BR>\n" );
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document.write( "2*(R*pi) = (R+6)*pi\r<BR>\n" );
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document.write( "Solve for R.\r<BR>\n" );
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document.write( "Use pi = 3.1416. \r<BR>\n" );
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