document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=567914>Question 567914</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The vertex angle of an isosceles triangle is 72°,and each of equal sides is 10 cm.Find the perimeter and the area of 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 #366800 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=366800\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> let the vertex be A where the legs meet\r<BR>\n" );
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document.write( "legs are 10 cm each<BR>\n" );
document.write( "B & C are the vertices of the base\r<BR>\n" );
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document.write( "Law of Sines\r<BR>\n" );
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document.write( "a/sin A = b/sin B = c/sin C\r<BR>\n" );
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document.write( "a/sin 72 = 10/Sin 54 = c/Sin 54\r<BR>\n" );
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document.write( "a= 10*sin 72/Sin 54 <BR>\n" );
document.write( "a= 11.75\r<BR>\n" );
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document.write( "So the perimeter = 11.75+10+10<BR>\n" );
document.write( "perimeter = 31.75 cm </SPAN>\n" );
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