document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=195892>Question 195892</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I never get how to do these!!  They so frustrating! I believe that there's a formula involved, though I'm not sure...\r<BR>\n" );
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document.write( "Each interior angle of a regular polygon measures 156°. How many sides does the polygon have?\r<BR>\n" );
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document.write( "A: 13<BR>\n" );
document.write( "B: 14<BR>\n" );
document.write( "C: 15<BR>\n" );
document.write( "D: 16\r<BR>\n" );
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document.write( "It's not 14, I can tell you that. I don't know why it's not 14 though.<BR>\n" );
document.write( "thank you!!  :) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #146879 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=146879\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I never get how to do these!! They so frustrating! I believe that there's a formula involved, though I'm not sure... <BR>\n" );
document.write( "Each interior angle of a regular polygon measures 156°. How many sides does the polygon have? <BR>\n" );
document.write( "A: 13<BR>\n" );
document.write( "B: 14<BR>\n" );
document.write( "C: 15<BR>\n" );
document.write( "D: 16 <BR>\n" );
document.write( "It's not 14, I can tell you that. I don't know why it's not 14 though.<BR>\n" );
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document.write( "The sum of the interior angles of a polygon (all polygons) is<BR>\n" );
document.write( "180º*(n-2) (n is the number of sides)<BR>\n" );
document.write( "So, each angle is 180*(n-2)/n<BR>\n" );
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document.write( "156 = 180(n-2)/n<BR>\n" );
document.write( "156n = 180(n-2)<BR>\n" );
document.write( "156n = 180n - 360<BR>\n" );
document.write( "-24n = -360<BR>\n" );
document.write( "n = 15<BR>\n" );
document.write( "15 sides, 15 angles<BR>\n" );
document.write( " </SPAN>\n" );
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