21 is a triangular number. true and false​

Question

21 is a triangular number.
true and false​

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Brielle 2 months 2021-09-25T05:43:24+00:00 1 Answer 0 views 0

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    0
    2021-09-25T05:44:46+00:00

    Answer:

    True . You can draw the figure for understanding nicely

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