document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=480352>Question 480352</A>: <I><SPAN STYLE=\"word-break: break-all;\"> can you please help me with this? I need to know how to column proof this. Given: &#8736;BAD&#8773;&#8736;CAD AD &#10200; BC<BR>\n" );
document.write( "Prove: &#916;ABC is isosceles\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #328994 by </B><A HREF=/tutors/aboutme.mpl?userid=Edwin+McCravy><B>Edwin McCravy(20056)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Edwin+McCravy><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=Edwin+McCravy><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=328994\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=drawing%28400%2C300%2C-2%2C2%2C-1%2C2%2C%0D%0Alocate%28-1%2C0%2CB%29%2Clocate%280%2C0%2CD%29%2C+locate%281%2C0%2CC%29%2C+locate%280%2C1.7%2CA%29%2C%0D%0Arectangle%28-.1%2C0%2C0%2C.1%29%2C+arc%280%2C1.5%2C.5%2C-.5%2C236.3099%2C270%29%2C+%0D%0Aarc%280%2C1.5%2C.6%2C-.6%2C270%2C303.69%29%2C%0D%0Atriangle%28-1%2C0%2C1%2C0%2C0%2C1.5%29%2C+triangle%28-1%2C0%2C0%2C0%2C0%2C1.5%29+%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "&#8736;BAD &#8773; &#8736;CAD          |  given\r\n" );
document.write( "  AD &#8773; AD             |  reflexive property of congruence\r\n" );
document.write( "&#8736;BDA is a right angle |  AD &#10200; BC is given\r\n" );
document.write( "&#8736;CDA is a right angle |  AD &#10200; BC is given\r\n" );
document.write( "&#8736;BDA &#8773; &#8736;CDA          |  all right angles are congruent.\r\n" );
document.write( "&#916;ADB &#8773; &#916;ADC           |  angle-side-angle\r\n" );
document.write( "  AB &#8773; AC             |  corr. parts of congruent triangles\r\n" );
document.write( "&#916;ABC is isosceles     |  &#916;ABC has two congruent sides \r\n" );
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document.write( "Edwin</PRE>                       </SPAN>\n" );
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