document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=55910>Question 55910</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0073016020/algebrahomeworkh>Beginning Algebra</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> Can someone help me out on this problem?  I sure am lost.\r<BR>\n" );
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document.write( " For the floor plan - a building that has four corners of a room located at the points (2, 3), (ll, 6), (-3, 18), and (8. 21),  I need to determine whether the side throug the points (2, 3) and (11, 6) is perpendicular to the side through the points (2, 3) and (-3, 18).\r<BR>\n" );
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document.write( "  Thanks,<BR>\n" );
document.write( "  Sher </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #37920 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley71><B>checkley71(8403)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley71><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=37920\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> slope of line through (2,3)(11,6) is<BR>\n" );
document.write( "(6-3)/(11-2)=3/9=1/3<BR>\n" );
document.write( "slope of line through (2,3)(-3,18) is<BR>\n" );
document.write( "(18-3)/(-3-2)=15/-5=-3<BR>\n" );
document.write( "therefore the line with a slope of -3 is perpendicular to the line with a slope of 1/3 (-3 is the negative reciprical of 1/3).\r<BR>\n" );
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