document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=522770>Question 522770</A>: <I><SPAN STYLE=\"word-break: break-all;\"> What is the area of an isosceles triangle with the base angles of 57degrees and a base of 15 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #346988 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=346988\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> What is the area of an isosceles triangle with the base angles of 57degrees and a base of 15<BR>\n" );
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document.write( "Sketch the triangle with base 15 and base angles 57 degrees.<BR>\n" );
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document.write( "Draw a perpendicular bisector of the base.<BR>\n" );
document.write( "That bisector is the altitute of the triangle.<BR>\n" );
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document.write( "You have a right triangle on the right side<BR>\n" );
document.write( "with base = 15/2 = 7.5<BR>\n" );
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document.write( "Solve tan(57) = alt/7.5<BR>\n" );
document.write( "altitude = 7.5*tan(57) = 11.55<BR>\n" );
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document.write( "Area = (1/2)base*altitude<BR>\n" );
document.write( "A = (1/2)*7.5*11.55 = 43.31 sq units<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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