document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=847873>Question 847873</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The length of a rectangle is three times its width and the length of its diagonal is 6&#8730;10cm.Find the perimeter. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #510720 by </B><A HREF=/tutors/aboutme.mpl?userid=swincher4391><B>swincher4391(1107)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=swincher4391><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=swincher4391><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=510720\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let the width be x.  Then length is 3x.\r<BR>\n" );
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document.write( "Notice that when we take two sides with its diagonal we have a right triangle.\r<BR>\n" );
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document.write( "Apply pythagorean theorem.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2+%2B+%283x%29%5E2+=+%286%2Asqrt%2810%29%29%5E2 ALIGN=MIDDLE  ALT=\"x%5E2+%2B+%283x%29%5E2+=+%286%2Asqrt%2810%29%29%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2+%2B+9x%5E2+=+360 ALIGN=MIDDLE  ALT=\"x%5E2+%2B+9x%5E2+=+360\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10x%5E2+=+360 ALIGN=MIDDLE  ALT=\"10x%5E2+=+360\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2+=+36 ALIGN=MIDDLE  ALT=\"x%5E2+=+36\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=6 ALIGN=MIDDLE  ALT=\"x=6\"   DISABLED_style= \"max-width:90%; height:auto;\" > <---width\r<BR>\n" );
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document.write( "Then our length is 18.\r<BR>\n" );
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document.write( "P = 2L + 2W\r<BR>\n" );
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document.write( "P = 2(6) + 2(18) = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%2848%29 ALIGN=MIDDLE  ALT=\"highlight%2848%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > cm  </SPAN>\n" );
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