document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1165628>Question 1165628</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Given: AB= DC<BR>\n" );
document.write( "prove: AC= DB </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #852959 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(53266)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><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=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=852959\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .<BR>\n" );
document.write( "Given: AB= DC<BR>\n" );
document.write( "prove: AC= DB<BR>\n" );
document.write( "~~~~~~~~~~~~~~~~~~~~~~~~~~\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "The problem formulation in the post is FATALLY INCOMPLETE,<BR>\n" );
document.write( "and therefore the problem can not be solved properly.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "The logic and the reasoning in the post by @CPhill are irrelevant <BR>\n" );
document.write( "to the possible case. @CPhill starts from consideration of a kite shape,<BR>\n" );
document.write( "which is 100% not relevant to the given equalities.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "If this relates to quadrilaterals on the plane, then only two cases<BR>\n" );
document.write( "can be relevant: (a) parallelograms, and (b) isosceles trapezoids.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "But then the problem's description must provide relevant conditions <BR>\n" );
document.write( "for such a quadrilateral to be a parallelogram or an isosceles trapezoid.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Without it, the problem is the same absurdist non-sensical creation<BR>\n" );
document.write( "as a two-leg horse from the story about the baron Munchausen<BR>\n" );
document.write( "and can exist only in sick imagination or in tales for children to make them laugh.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Posting such incomplete defective \"problems\" to this forum is unacceptable hooliganism.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "The way how @CPhill reacts to such absurdist problems, is a hooliganism in degree 7 (seven).\r<BR>\n" );
document.write( "\n" );
document.write( "He piles nonsense on top of other nonsense.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );