Question

Which of the following is a triangular number?

(a) 0 (b) 10 (c) 7 (d) 5​

Answer 1

Answer:

Option b) 10 is a triangular number

Answer 2

Answer:

A triangular number or triangle number counts objects arranged in an equilateral triangle. The nth triangular number is the number of dots in the triangular arrangement with n dots on a side, and is equal to the sum of the n natural numbers from 1 to n.

Step-by-step explanation:

c) is the answer

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