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Express how you know that the sum of any two consecutive triangular numbers is a square number.
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Express how you know that the sum of any two consecutive triangular numbers is a square number.

User Tevfik Xung
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Answer: Beacause 2 triangles make a square

Step-by-step explanation: 2 triangles make a square so it must be the same with numbers? -an 8th grader(me) [lol i'm not that smart]

User Algirdas
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