SOLUTION: 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 ex. the # 3 has 6 dots in it's tri

Question 186512: 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
ex. the # 3 has 6 dots in it's triangle
I need to know what the pattern or equation is to solve this with any number
thanks for helping

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
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
ex. the # 3 has 6 dots in it's triangle
I need to know what the pattern or equation is to solve this with any number
-----------------------
1+2+3+4+5+6+....+n
Formula:
S(n) = (n/2)(1+n)
=======================
Cheers,
Stan H.
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