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There is no such thing as a "triangular" number (as a number), a triangular number or triangle number counts the objects that can form an equilateral triangle. One object can and Three objects can but not Two objects.

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Q: Does 1 2 3 give a triangular number?
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Related questions

What is the xth triangular number?

The formula for the nth triangular number is n(n+1)/2. Therefore, the fourth triangular number is equal to 4 x (4+1) / 2 = (4 x 5) / 2 = 10. The fiftieth triangular number is equal to 50 x (50+1) / 2 = (50 x 51) / 2 = 1275.


How do you find the triangular number?

The nth triangular number is n(n+1)/2


What is the th triangular number?

The nth triangular number is n(n+1)/2


How do you find the 20Th triangular number?

The 20th triangular number is 20*21/2 = 210


The 8th triangular number is 36 what is the 7th triangular number?

The formula for the nth triangular number is n(n+1)/2. If the 8th triangular number is 36, then we can set up the equation 8(8+1)/2 = 36. Solving for n, we get n = 7. Therefore, the 7th triangular number is 7(7+1)/2 = 28.


Is 9 a triangular number?

yes it is!EDIT: No, it is not.


What is the 81st triangle number?

The 81st triangular number is 3321 The nth triangular number is given by tn = n(n+1) ÷ 2 The 81st triangular number is: t81 = 81(81+1) ÷ 2 = 3321


What is the formula for triangular numbers?

The Nth triangular number is calculated by: N(N + 1) -------- 2 Hope this is useful!


Could 36 be a triangular number?

36 is a triangular number. The formula for the nth triangular number is, n(n + 1)/2. So, 36 is the 8th triangular number : 8 x 9/2 = 36


What is the 2000th triangular number?

The nth triangular number is n(n+1)/2, so the 2000th triangular number is 2000 * 2001 / 2 = 2,001,000


How do you check if a number is a triangular number?

you need to use this formula: n(n+1) T=--------- 2 So number times (number + 1) divided by 2. If the number you get is the same number as n its a triangular number. if it isn't well it isn't a triangular number.


What is the method to find the 6 triangular number?

The nth triangular number is n(n+1)/2