document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=318522>Question 318522</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the area of an equilateral triangle that has a perimeter of 21 inches.  Round the answer to one decimal place. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #227976 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=227976\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> perimeter of equilateral triangle = 21<BR>\n" );
document.write( "side = 7<BR>\n" );
document.write( "s=21/2<BR>\n" );
document.write( "area = sqrt{s(s-a)(s-b)(s-c)}<BR>\n" );
document.write( "area=sqrt{21/2(21/2-7)^3}<BR>\n" );
document.write( "area = 21.2 sq.in </SPAN>\n" );
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