document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=186512>Question 186512</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Triangular numbers are numbers which can be represented by dots in a triangular array. each side has the same length as the number it represents<BR>\n" );
document.write( "ex. the # 3 has 6 dots in it's triangle<BR>\n" );
document.write( "I need to know what the pattern or equation is to solve this with any number<BR>\n" );
document.write( "thanks for helping<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #139766 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=139766\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Triangular numbers are numbers which can be represented by dots in a triangular array. each side has the same length as the number it represents<BR>\n" );
document.write( "ex. the # 3 has 6 dots in it's triangle<BR>\n" );
document.write( "I need to know what the pattern or equation is to solve this with any number<BR>\n" );
document.write( "-----------------------<BR>\n" );
document.write( "1+2+3+4+5+6+....+n\r<BR>\n" );
document.write( "\n" );
document.write( "Formula:<BR>\n" );
document.write( "S(n) = (n/2)(1+n)<BR>\n" );
document.write( "=======================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );