document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=817695>Question 817695</A>: <I><SPAN STYLE=\"word-break: break-all;\"> prove that the triangle with vertices (2 1) (6 9) and (-2 3) is a right triangle. determine which angles is 90 degree </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #492150 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=492150\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> (2, 1) (6, 9) and (-2, 3)<BR>\n" );
document.write( "line (2, 1) (6, 9) and line (2,1) (-2, 3)form  a right angle<BR>\n" );
document.write( "line | y = 2 x-3<BR>\n" );
document.write( "line | y = 2-x/2<BR>\n" );
document.write( "slope 2 and -1/2 </SPAN>\n" );
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