document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=589283>Question 589283</A>: <I><SPAN STYLE=\"word-break: break-all;\"> given the endpoints of the diameter of the circle are (-8,4) and (-4,8). write the equation of the circle </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #374834 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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=374834\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> given the endpoints of the diameter of the circle are (-8,4) and (-4,8). write the equation of the circle<BR>\n" );
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document.write( "Standard form of equation for circle: (x-h)^2+(y-k)^2=r^2, (h,k) being the (x,y) coordinates of the center, r=radius.<BR>\n" );
document.write( "use midpoint formula to find center:<BR>\n" );
document.write( "(x1+x2)/2, (y1+y2)/2<BR>\n" );
document.write( "(-8-4)/2/(4+8)/2=(-6,6)<BR>\n" );
document.write( "center: (-6,6)<BR>\n" );
document.write( "use distance formula to find diameter:<BR>\n" );
document.write( "d^2=(x1-x2)^2+(y1-y2)^2<BR>\n" );
document.write( "d^2=(-8+4)^2+(4-8)^2<BR>\n" );
document.write( "d^2=16+16=32<BR>\n" );
document.write( "d=&#8730;32<BR>\n" );
document.write( "radius=&#8730;32/2<BR>\n" );
document.write( "r^2=32/4=8<BR>\n" );
document.write( "Equation of given circle:<BR>\n" );
document.write( "(x+6)^2+(y-6)^2=8 </SPAN>\n" );
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