It actually depends if it's even or odd. So with odd numbers you take away one then divide by two then times it by the number you started with and you have your answer. I'll show you.
e.g 13-1=12/2=6 13x6=78
With even numbers its almost the same thing but all you do is divide by two again and times by the number you started with and your answer is there.
22/2=11 22x11=242
The Nth triangular number is calculated by: N(N + 1) -------- 2 Hope this is useful!
The nth triangular number is 0.5*n*(n+1)
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
The 24th triangular number is 300. This was found using the formula: n(n+1) divided by 2
1234 and you will see its triagular
What is the formula for a triangular prism
Oh, dude, the 1000th triangular number is technically 500500. It's calculated by multiplying 1000 by 1001 and then dividing by 2. But hey, who's really keeping track of all these numbers anyway, right? Like, just enjoy the fact that it's a big ol' number with a fancy name.
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.
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.
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.
Is 63 a triangular number I think it is a triangular number.
Triangular numbers can be calculated by using the following formula (n * (n+1) ) / 2 so for 30 the answer is (30*31)/2 = 465