document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1210570>Question 1210570</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Let P_1 P_2 P_3 \dotsb P_{10} be a regular polygon inscribed in a circle with radius $1.$  Compute<BR>\n" );
document.write( "P_1 P_2 + P_2 P_3 + P_3 P_4 + \dots + P_9 P_{10} + P_{10} P_1 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #853692 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(53617)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><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=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=853692\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .<BR>\n" );
document.write( "Let P_1 P_2 P_3 ... P_{10} be a regular polygon inscribed in a circle with radius 1.  Compute<BR>\n" );
document.write( "P_1 P_2 + P_2 P_3 + P_3 P_4 + . . .  + P_9 P_{10} + P_{10} P_1<BR>\n" );
document.write( "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\r<BR>\n" );
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document.write( "If this sum \r<BR>\n" );
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document.write( "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;P_1 P_2 + P_2 P_3 + P_3 P_4 + . . .  + P_9 P_{10} + P_{10} P_1\r<BR>\n" );
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document.write( "is the sum of vectors, then this sum is equal to zero - as any sum of vectors along a closed contour.\r<BR>\n" );
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document.write( " </SPAN>\n" );
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