document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=817527>Question 817527</A>: <I><SPAN STYLE=\"word-break: break-all;\"> What is the length of an altitude of an equilateral triangle whose side is 9 \r<BR>\n" );
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document.write( "A) 9/2 radical 3\r<BR>\n" );
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document.write( "B) 9/2\r<BR>\n" );
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document.write( "C) 18\r<BR>\n" );
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document.write( "D) 9/2 radical 2 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #492092 by </B><A HREF=/tutors/aboutme.mpl?userid=TimothyLamb><B>TimothyLamb(4379)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=TimothyLamb><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=TimothyLamb><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=492092\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> hyp = 9<BR>\n" );
document.write( "hyp = sqrt( a^2 + (hyp/2)^2 )<BR>\n" );
document.write( "9 = sqrt( a^2 + (9/2)^2 )<BR>\n" );
document.write( "81 = a^2 + (9/2)^2<BR>\n" );
document.write( "a^2 = 81 - (9/2)(9/2)<BR>\n" );
document.write( "a^2 = 81 - (81/4)<BR>\n" );
document.write( "a^2 = 81(4/4) - 81(1/4)<BR>\n" );
document.write( "a^2 = 81( (4/4) - (1/4) )<BR>\n" );
document.write( "a^2 = 81(3/4)<BR>\n" );
document.write( "a^2 = (81/4)3<BR>\n" );
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document.write( "a = 9/2 * sqrt(3)<BR>\n" );
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