document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1034555>Question 1034555</A>: <I><SPAN STYLE=\"word-break: break-all;\">  A farmer has a triangular field besides 120 yards, 170 yards, and 220 yards. Find the area of the field in square yards.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #649201 by </B><A HREF=/tutors/aboutme.mpl?userid=addingup><B>addingup(3677)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=addingup><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=addingup><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=649201\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Knowing all three sides we can use Hero's formula:<BR>\n" );
document.write( "Let a, b, c be the sides<BR>\n" );
document.write( "Let p = 1/2 perimeter<BR>\n" );
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document.write( "Perimeter: a+b+c = 120+170+220 = 510<BR>\n" );
document.write( "p = 510/2 = 255<BR>\n" );
document.write( "`````````````````````````````````````````````<BR>\n" );
document.write( "Hero's formula:<BR>\n" );
document.write( "&#8730;p(p-a)(p-b)(p-c) = &#8730;255(255-120)(255-170)(255-220) = 10,120 or if you want to be super precise: 10,119.99876<BR>\n" );
document.write( "John </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );