document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1024085>Question 1024085</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Prove by mathematical induction that the sum of the interior angles of a regular polygon of n sideas (n-1)180 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #639576 by </B><A HREF=/tutors/aboutme.mpl?userid=FrankM><B>FrankM(1040)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=FrankM><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=FrankM><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=639576\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The answer is (N-2)180 and the induction is as follows -\r<BR>\n" );
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document.write( "A triangle has 3 sides and 180 degrees<BR>\n" );
document.write( "A square has 4 sides and 360 degrees<BR>\n" );
document.write( "A pentagon has 5 sides and 540 degrees\r<BR>\n" );
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document.write( "The relation between N sides and degrees, is (N-1)180\r<BR>\n" );
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document.write( "Try drawing the 3 figures. Draw one diagonal to cut the square into 2 triangles. Not draw 2 lines in the pentagon from one vertex, to make 3 triangles. Each triangle has 180 degrees.  </SPAN>\n" );
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