document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=163037>Question 163037</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A(-2,0) B(0,2) C(2,0) D(0,-2) prove ABCD is equilateral </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #120146 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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=120146\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I'll give you a hint to get you started.\r<BR>\n" );
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document.write( "An equilateral polygon is simply a polygon with equal sides. So to prove that ABCD is equilateral, simply prove that the distance from A to B equals the distance from B to C. Then prove that the distance from B to C is equal to the distance from C to D. Finally prove that the distance from C to D is equal to the distance from D to A. In other words, show that\r<BR>\n" );
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document.write( "AB=BC<BR>\n" );
document.write( "BC=CD<BR>\n" );
document.write( "CD=AD<BR>\n" );
document.write( "AD=AB\r<BR>\n" );
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document.write( "This will also show that AB=CD, CD=AB, etc (but this info is not needed)\r<BR>\n" );
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document.write( "Once you have done all of this, you can conclude that ABCD is equilateral since it has 4 equal sides. </SPAN>\n" );
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