Question

what is 8 triangular number

Answer 1

This is the Triangular Number Sequence: 1, 3, 6, 10, 15, 21, 28, 36, 45, etc..
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Answer 2

Answer:

Step-by-step explanation:

a triangular number is a number having the form n (n + 1) / 2 where n is a natural number. examples are 3 , 6 , 10 , 15 and so on