document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1181240>Question 1181240</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The diagonals of right trapezoid are perpendicular.<BR>\n" );
document.write( "What is the area of the trapezoid if the parallel bases<BR>\n" );
document.write( "measure 8cm and 18cm? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #811169 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13203)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=811169\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "A very fancy solution indeed from the other tutor....<br><BR>\n" );
document.write( "But that solution method makes a \"first class\" geometry problem out of a relatively simple algebraic one.<br><BR>\n" );
document.write( "Draw a sketch with the vertical edge of the right trapezoid at the left and the longer base at the bottom; let h be the height of the trapezoid.<br><BR>\n" );
document.write( "Then the slope of the shorter diagonal is x/8, and the slope of the longer diagonal is -x/18.<br><BR>\n" );
document.write( "The diagonals are perpendicular, so<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28x%2F8%29%28-x%2F18%29=-1 ALIGN=MIDDLE  ALT=\"%28x%2F8%29%28-x%2F18%29=-1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-x%5E2%2F144=-1 ALIGN=MIDDLE  ALT=\"-x%5E2%2F144=-1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2=144 ALIGN=MIDDLE  ALT=\"x%5E2=144\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+12 ALIGN=MIDDLE  ALT=\"x+=+12\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "The height of the trapezoid is 12; its area is<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=12%28%288%2B18%29%2F2%29=12%2813%29=156 ALIGN=MIDDLE  ALT=\"12%28%288%2B18%29%2F2%29=12%2813%29=156\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "ANSWER: 156<br><BR>\n" );
document.write( " </SPAN>\n" );
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