document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=109644>Question 109644</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Classify the triangle with the given side lengths as acute, right or obtuse<BR>\n" );
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document.write( "8, 10, 12\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #79926 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=79926\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Classify the triangle with the given side lengths as acute, right or obtuse\r<BR>\n" );
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document.write( "8, 10, 12 <BR>\n" );
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document.write( "The largest angle is opposite the side of length 12.<BR>\n" );
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document.write( "Using the Law of Cosines:<BR>\n" );
document.write( "Let angle opposite side of length 12 be \"a\".<BR>\n" );
document.write( "Cos(A) = [b^2+c^2-a^2]/2bc<BR>\n" );
document.write( "Cos(A) = [8^2+10^2-12^2]/2*8*10<BR>\n" );
document.write( "Cos(A) = 0.125<BR>\n" );
document.write( "A = arccos (0.125) = 82.82 degrees<BR>\n" );
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document.write( "It is an acute triangle.<BR>\n" );
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document.write( "Stan H. </SPAN>\n" );
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