document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=229607>Question 229607</A>: <I><SPAN STYLE=\"word-break: break-all;\"> ABCDEFGHIF is a regular decagon<BR>\n" );
document.write( "Find m angle ABC<BR>\n" );
document.write( "angleXBC is an exterior angle at vertex. Find m anleXBC </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #170200 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=170200\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  ABCDEFGHIF is a regular decagon<BR>\n" );
document.write( "Find m angle ABC<BR>\n" );
document.write( "angleXBC is an exterior angle at vertex. Find m anleXBC<BR>\n" );
document.write( "--------------------<BR>\n" );
document.write( "There's a 2nd F, I'll assume it should be a J.<BR>\n" );
document.write( "The sum of interior angles in any polygon with n sides is:<BR>\n" );
document.write( "(n-2)*180<BR>\n" );
document.write( "For 10 sides = 1440 degrees<BR>\n" );
document.write( "Each angle is 1440/10 = 144 degrees<BR>\n" );
document.write( "-----------------<BR>\n" );
document.write( "The exterior angle is 180 - 144 = 36 degrees<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );