document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=142703>Question 142703</A>: <I><SPAN STYLE=\"word-break: break-all;\"> CD is tangent to circle Z at (1,7). If Z has coordinates (5,2), find the slope of CD.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #103845 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=103845\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> CD is tangent to circle Z at (1,7). If Z has coordinates (5,2), find the slope of CD. <BR>\n" );
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document.write( "Draw a circle with center at Z(5,2) and perimeter passing thru W which has<BR>\n" );
document.write( "coordinates (1,7).<BR>\n" );
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document.write( "Draw a radius from Z to W.<BR>\n" );
document.write( "Draw a tangent at (1,7) that is perpendicular to ZW.<BR>\n" );
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document.write( "The slope of ZW is (7-5)/(1-5) = 2/-4 = -1/2<BR>\n" );
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document.write( "Then the slope of CD must be 2 since it is perpendicular to ZW<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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