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What does triangle numbers mean?

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Anonymous

10y ago
Updated: 9/17/2019

1 = 1

3 = 1 + 2

6 = 1 + 2 + 3

10 = 1 + 2 + 3 + 4

15 = 1 + 2 + 3 + 4 + 5

this is how we work out triangular numbers. It is the number of dots that when drawn form a triangle

The formula for the nth triangular number is n(n+1)/2

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Wiki User

15y ago

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