document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=543120>Question 543120</A>: <I><SPAN STYLE=\"word-break: break-all;\"> sorry this is geometry but my proof is hard and i need your help.<BR>\n" );
document.write( "given: segment BC is congruent to segment BA, segment CD is congruent to AD.<BR>\n" );
document.write( "prove: triangle ABD is congruent to triangle CBD.. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #354769 by </B><A HREF=/tutors/aboutme.mpl?userid=bucky><B>bucky(2189)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=bucky><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=354769\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I'm not sure that I understand the relationships that you describe among the two triangles. But I think you can prove triangle ABD is congruent to triangle CBD using the following logic:<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Given: Triangles ABD and CBD<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Prove Triangle ABD congruent to Triangle CBD<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Side BA congruent to Side BC ..... Given<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Side AD congruent to side CD ..... Given<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Side BD congruent to side BD ..... Identity<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Triangles ABD & CBD are congruent ... Side/Side/Side congruent to Side/Side/Side<BR>\n" );
document.write( ".<BR>\n" );
document.write( "From your description, I believe that BD is a common side in both triangles and therefore it is a congruent side in both triangles. Two triangles are congruent if all three of their corresponding sides are congruent.  <BR>\n" );
document.write( ".<BR>\n" );
document.write( "If this doesn't work because I have misinterpreted your description of the problem, please re-post your problem and another tutor may be have a better idea of how to help you with this proof.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );