document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=224302>Question 224302</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The base of an isosceles triangle is 21 centimeters long. The altitude to the base is 9 centimeters long. What is the approximate measure of a base angle of the triangle </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #167563 by </B><A HREF=/tutors/aboutme.mpl?userid=RAY100><B>RAY100(1637)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=RAY100><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=167563\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A  rough  sketch  helps  to  visualize.<BR>\n" );
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document.write( "the  base  of  the  isosceles  triangle is  21,  and  the  median  from  the  opposite  vertex  is  the  height,,,  which  is  9<BR>\n" );
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document.write( "This  causes  a right  triangle, legs 9 and  10.5 (21/2)<BR>\n" );
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document.write( "The  base  angle  of  the  triangle  has, tan x = opp/adj = h/(b/2) =9/10.5 = .8571<BR>\n" );
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document.write( "the  angle  x = tan^-1 (.8571) = 40.60 degrees<BR>\n" );
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document.write( "check....9/10.5 = tan 40.6,,,,.8571,,,,,ok </SPAN>\n" );
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