document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=119616>Question 119616</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I have been in geometry for three days and my teacher has given us one example and i just don't know how to even start to do them. we don't even have a text book. if you could help me i would really appreciate it. the problem is Give a line segment AD with points B and C between A and D. If AB=CD, then AC=BD. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #87626 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=87626\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The line segment is\r<BR>\n" );
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document.write( "a-b-c-d\r<BR>\n" );
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document.write( "You are given that ab = cd<BR>\n" );
document.write( "from looking at the line I see that<BR>\n" );
document.write( "(1) ac = ab + bc<BR>\n" );
document.write( "I can also see that<BR>\n" );
document.write( "(2) bd = bc + cd<BR>\n" );
document.write( "---------------------<BR>\n" );
document.write( "Now you are told to show that <BR>\n" );
document.write( "ac = bd<BR>\n" );
document.write( "---------------------<BR>\n" );
document.write( "From (1), <BR>\n" );
document.write( "ab = ac - bc<BR>\n" );
document.write( "From (2)<BR>\n" );
document.write( "cd = bd - bc<BR>\n" );
document.write( "--------------------<BR>\n" );
document.write( "If ab = cd as given,<BR>\n" );
document.write( "ac - bc = bd - bc<BR>\n" );
document.write( "Add bc to both sides and you get<BR>\n" );
document.write( "ac = bd </SPAN>\n" );
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