document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=429336>Question 429336</A>: <I><SPAN STYLE=\"word-break: break-all;\"> What is the area of a rectangle with vertices (2,4),(5,4),(5,10), and (2,10) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #298440 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=298440\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> What is the area of a rectangle with vertices (2,4),(5,4),(5,10), and (2,10)<BR>\n" );
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document.write( "The diff in x is 3 (5-2)<BR>\n" );
document.write( "The diff in y is 6 (10-4)<BR>\n" );
document.write( "Area = 3*6 = 18 sq units.<BR>\n" );
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document.write( "Another way, if the points are randomly spaced:<BR>\n" );
document.write( "A B C  D  A<BR>\n" );
document.write( "2 5 5  +2 +2<BR>\n" );
document.write( "4 4 10 10 4 (the +'s are for alignment)<BR>\n" );
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document.write( "Add the diagonals from upper left:<BR>\n" );
document.write( "2*4 + 5*10 + 5*10 + 2*4 = 116<BR>\n" );
document.write( "Add the diagonals from lower left:<BR>\n" );
document.write( "4*5 + 4*5 + 10*2 + 10*2 = 80<BR>\n" );
document.write( "116 - 80 = 36<BR>\n" );
document.write( "Area = 36/2 = 18, same answer<BR>\n" );
document.write( "That works for any number of points placed anywhere.\r<BR>\n" );
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