Question

what is the 30th triangular number ans by using the formula plzzzzzz ans​

Answer 1

Answer:  0, 1, 3, 6, 10, 15, 21, 28, 36, 45, 55, 66, 78, 91, 105, 120, 136, 153, 171, 190, 210, 231, 253, 276, 300, 325, 351, 378, 406, 435, 465, 496, 528, 561, 595, 630, 666...  

     

  Formula :Triangular numbers are a pattern of numbers that form equilateral triangles. The formula for calculating the nth triangular number is: T = (n)(n + 1) / 2.

Step-by-step explanation:

Answer 2

Answer:

The formula for calculating the nth triangular number is-

$n(n + 1) \div 2$

So, 30th triangular number is

= 30 x 31 /2

= 15 x 31

=465

Step-by-step explanation:

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