document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=852498>Question 852498</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need to work out how many square metres of turf i need to buy\r<BR>\n" );
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document.write( "for a triangular garden of 12m x 16m x 22m\r<BR>\n" );
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document.write( "hope you can help\r<BR>\n" );
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document.write( "thanks </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #513417 by </B><A HREF=/tutors/aboutme.mpl?userid=rothauserc><B>rothauserc(4718)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rothauserc><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=rothauserc><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=513417\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> we need to use Heron's formula for the area of a triangle given three sides<BR>\n" );
document.write( "This formula is Area = SQRT(s(s-a)(s-b)(s-c)), where s=(a+b+c)/2 or perimeter/2.<BR>\n" );
document.write( "first calculate the perimeter of the triangle divided by 2<BR>\n" );
document.write( "P = (12 + 16 + 22) / 2 = 50 / 2 = 25<BR>\n" );
document.write( "so s = 25, therefore<BR>\n" );
document.write( "A = square root(25(25-12)(25-16)(25-22))<BR>\n" );
document.write( "A = square root(25*13*9*3) = 93.67 approx 94 square meters of turf\r<BR>\n" );
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