SOLUTION: The triangular numbers are the whole numbers that are represented by certain triangular arrays of dots. There is a triangular number that has 66 dots in its shape. Which on

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Question 401106: The triangular numbers are the whole numbers that are represented by certain triangular arrays of dots.


There is a triangular number that has 66 dots in its shape. Which one is it? Write your answer as a number.

Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
66 = 1+2+3+...+11, so the 11th triangular number is 66.