document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=719099>Question 719099</A>: <I><SPAN STYLE=\"word-break: break-all;\"> plz solve this problem for me_<BR>\n" );
document.write( "Show that the points 3+2i,2-i,1+i,4+i lies on a circle. Find its center and radius. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #441211 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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/cgi-bin/show-face.mpl?user=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=441211\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Show that the points 3+2i,2-i,1+i,4+i lies on a circle. Find its center and radius.<BR>\n" );
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document.write( "Plot the points on the x-y plane, A(3,2), B(2,-1), C(1,1) & D(4,1)<BR>\n" );
document.write( "Check that no 3 of the points are colinear by finding the slopes of<BR>\n" );
document.write( "DA, AB, BC & CD (going in order of xes)<BR>\n" );
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document.write( "Any 3 non-colinear points define a circle.<BR>\n" );
document.write( "Get the equations of the perpendicular bisectors of 2 lines, AB & BC will do.<BR>\n" );
document.write( "The intersection of the bisectors is the center of the circle.<BR>\n" );
document.write( "The distance from the center to any of the A, B or C is the radius.<BR>\n" );
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document.write( "Check that point D is on the circle.<BR>\n" );
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document.write( " </SPAN>\n" );
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