document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=769061>Question 769061</A>: <I><SPAN STYLE=\"word-break: break-all;\"> how do I find the equation of the circle that satisfy this conditions?:\r<BR>\n" );
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document.write( "endpoints of diameter are P(-1,1) and Q(5,9) </SPAN>\n" );
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document.write( "endpoints of diameter are P(-1,1) and Q(5,9)<BR>\n" );
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document.write( "Standard form of equation for a circle:<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28x-h%29%5E2%2B%28y-k%29%5E2=r%5E2 ALIGN=MIDDLE  ALT=\"%28x-h%29%5E2%2B%28y-k%29%5E2=r%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" >, (h,k)=(x,y) coordinates of center, r=radius<BR>\n" );
document.write( "Use distance formula to find radius: diameter=&#8730;(x1-x2)^2+(y1-y2)^2)=&#8730;((5+1)^2+(9-1)^2)=&#8730;36+64<BR>\n" );
document.write( "=&#8730;100=10<BR>\n" );
document.write( "radius=10/2=5<BR>\n" );
document.write( "coordinates of center=midpoint of given points: (-1,1) and (5,9)<BR>\n" );
document.write( "midpoint=(x1+x2)/2,(y1+y2)/2=(-1+5)/2),(9+1)/2)=(2,5)<BR>\n" );
document.write( "center: (2,5)<BR>\n" );
document.write( "Equation of given circle:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28x-2%29%5E2%2B%28y-5%29%5E2=25 ALIGN=MIDDLE  ALT=\"%28x-2%29%5E2%2B%28y-5%29%5E2=25\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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