document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=776503>Question 776503</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If line AD has midpoint C, how can I prove that line segment AC is congruent to line segment CD? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #473644 by </B><A HREF=/tutors/aboutme.mpl?userid=KMST><B>KMST(5328)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=KMST><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=KMST><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=473644\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> That should be the definition of midpoint.<BR>\n" );
document.write( "I would define midpoint of segment AD as a point C, belonging to segment AD, such that segments AC and CD are congruent.<BR>\n" );
document.write( "That sounds \"official\" enough.<BR>\n" );
document.write( "Saying that it is the point that is exactly in the middle, or that it is at the same distance from both ends of the segment may give you a clearer idea of what midpoint is, neither is a rigurous definition. </SPAN>\n" );
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