document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=255069>Question 255069</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Determine the area of an equilateral triangle inscribed in a circle of radius 12 cm. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #187355 by </B><A HREF=/tutors/aboutme.mpl?userid=Greenfinch><B>Greenfinch(383)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Greenfinch><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=Greenfinch><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=187355\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Consider 1/3 of the equilateral triangle. It is a triangle with two sides of length 12 cm and the included angle of 120 degrees. Area is therefore <BR>\n" );
document.write( "1/2 x 12 x 12 x sin 120 = 72 sin 120 = 72 x (sqrt 3)/2 = 36 sqrt 3.<BR>\n" );
document.write( "So total is three times that or 108 sqrt 3 cm^2 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );