8thtriangularnumber

<-- Enter triangular number statement
  

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Calculate triangular number 8

The formula for triangular number n is as follows

Tn  =	n(n + 1)
	2

Given n = 8, we have:

T8  =	8(8 + 1)
	2

T8  =	8(9)
	2

T8  =	72
	2

T₈ = 36

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