True, A triangular number is represented in the form of dots, The The sides of an equatorial triangle are always the same, 3,6,10 are triangular numbers, The rows of triangular numbers are increased by 1, Triangular numbers have a simmilar concept to square numberss, False, Every number is a triangular number, A triangular number can always be divided by 3, The sides of an equatorial triangle are always different, 2,5,8,9 are triangular numbers

triangular numbers

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