document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=642235>Question 642235</A>: <I><SPAN STYLE=\"word-break: break-all;\">  The sum of angles of a triangle is 180degree and Exterior angle of a triangle is equal to sum of interior opposite angle. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #404009 by </B><A HREF=/tutors/aboutme.mpl?userid=MathLover1><B>MathLover1(20850)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathLover1><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=MathLover1><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=404009\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I guess, you need a proof.\r<BR>\n" );
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document.write( "1. angle ACE ie exterior angle of triangle ABC.....| given<BR>\n" );
document.write( "2. mA+mB+mACB=180..............................................|the sum theorem<BR>\n" );
document.write( "3. m ACE +m ACB=180........................................|def. of linear pair<BR>\n" );
document.write( "4. mA+mB+mACB=m ACE +mACB........................|transitive property<BR>\n" );
document.write( "5. mA +mB=m ACE.........................................|subtraction property\r<BR>\n" );
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document.write( " </SPAN>\n" );
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