document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=341458>Question 341458</A>: <I><SPAN STYLE=\"word-break: break-all;\"> if the sum of the interior angles measure of a polygon is 1440 degrees, how many sides does the polygon have? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #244505 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=244505\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The sum of the interior and exterior angle at each vertex = 180 degs<BR>\n" );
document.write( "The sum of the exterior angles for ALL polygons = 360 degs<BR>\n" );
document.write( "Add 360 to 1440 = 1800 degs<BR>\n" );
document.write( "1800/180 = 10 sides<BR>\n" );
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document.write( "The usual method:<BR>\n" );
document.write( "Sum of interior angles = 180*(n-2) = 1440<BR>\n" );
document.write( "180n - 360 = 1440<BR>\n" );
document.write( "180n = 1800<BR>\n" );
document.write( "n = 10<BR>\n" );
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document.write( "Add 360 to the interior total, divide by 180, either way.<BR>\n" );
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