document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=308413>Question 308413</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I have a triangle, it is an isoceles (I think i spelled that wrong). I know it is isoceles because it has a base then, the two sides are marked congruent. I have the degree measure of one angle, its 70 degrees. So, i found out the other degree angles are 70, and 30. It gives me the base length, 10. I need to find the area. I know to find the area, I need to find the height. (A= 1/2 bh) That's where I got stuck. How do I do this problem? Thank you.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #220496 by </B><A HREF=/tutors/aboutme.mpl?userid=Fombitz><B>Fombitz(32388)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Fombitz><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=Fombitz><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=220496\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Couple of things. <BR>\n" );
document.write( "You did spell isoceles correctly. <BR>\n" );
document.write( "However your angle is off. <BR>\n" );
document.write( "The sum of the angles of a triange equal 180.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=70%2B70%2BA=180 ALIGN=MIDDLE  ALT=\"70%2B70%2BA=180\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A=180-140 ALIGN=MIDDLE  ALT=\"A=180-140\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A=40 ALIGN=MIDDLE  ALT=\"A=40\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "So the angle is 40 degrees, not 30. <BR>\n" );
document.write( ".<BR>\n" );
document.write( ".<BR>\n" );
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document.write( "If you drop a line from the 40 degree vertex that bisects the base you then create two right triangles from your isoceles triangle. <BR>\n" );
document.write( "From trig, you know that <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=tan%2870%29=OPP%2FADJ ALIGN=MIDDLE  ALT=\"tan%2870%29=OPP%2FADJ\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "In your case,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=ADJ=%281%2F2%29%2810%29=5 ALIGN=MIDDLE  ALT=\"ADJ=%281%2F2%29%2810%29=5\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=OPP=h ALIGN=MIDDLE  ALT=\"OPP=h\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "which is the height you need for the area equation.<BR>\n" );
document.write( "SO then,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=h=5%2Atan%2870%29 ALIGN=MIDDLE  ALT=\"h=5%2Atan%2870%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "and the area is then,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A=%281%2F2%29%285%29%2A5%2Atan%2870%29 ALIGN=MIDDLE  ALT=\"A=%281%2F2%29%285%29%2A5%2Atan%2870%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "This is the area of the right triangle.<BR>\n" );
document.write( "Double it to get the area of the isoceles triangle.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Ai=2%281%2F2%2925%2Atan%2870%29 ALIGN=MIDDLE  ALT=\"Ai=2%281%2F2%2925%2Atan%2870%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Ai=25%2Atan%2870%29 ALIGN=MIDDLE  ALT=\"Ai=25%2Atan%2870%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > or approximately<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Ai=68.7 ALIGN=MIDDLE  ALT=\"Ai=68.7\"   DISABLED_style= \"max-width:90%; height:auto;\" > sq. units. <BR>\n" );
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