document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=475813>Question 475813</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A student claimed that the sum of the measures of the interior angles <BR>\n" );
document.write( "of a 10-sided polygon is 1800 degree. Her proof was to connect a point in the interior with the vertices to form 10 triangles. Thus 10 x 180 degree. What do you think about the proof? Explain your reasoning.  <BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #326279 by </B><A HREF=/tutors/aboutme.mpl?userid=richard1234><B>richard1234(7193)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richard1234><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=richard1234><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=326279\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Umm if you connect a point in the interior with the rest of the vertices, you would form eight triangles, not ten. Given a fixed vertex A1, you can create triangles A1A2A3, A1A3A4, ..., A1A9A10, in which there are eight triangles, sum of the interior angles is 8*180 = 1440. </SPAN>\n" );
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