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The nth triangular number is 0.5*n*(n+1)

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Related questions

What is the formula of a triangular prism?

What is the formula for a triangular prism


What is the formula for triangular numbers?

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


What numbers are their in a triangular numbers?

None. There is nobody to whom triangular numbers belong.


What are the first 5 triangular numbers?

Triangle numbers or triangular numbers are those numbers that can form an equilateral triangle when counting the objects. The first five triangular numbers are: 1, 3, 6, 10, 15.


What is the triangular number of 30?

Triangular numbers can be calculated by using the following formula (n * (n+1) ) / 2 so for 30 the answer is (30*31)/2 = 465


What triangular numbers are square numbers?

1,36,1225,41616,1413721


What two triangular numbers make sixteen?

6 and 10 are triangular numbers that make 16.


How many triangular numbers are also square numbers?

There are an many triangular numbers that are also square numbers. Simply put, the sum of two consecutive triangular number equals a square number. Examples include 1 and 36.


What is the 1000th triangular number?

The formula for triangular numbers is (half of n) multiplied by (n+1). Putting in 1000 as n you get: 500 multiplied by 1001 which equals 500500. The answer is 500500.


The smaller of two triangular numbers whose sum and difference are also triangular numbers?

the answer is of course 12


How do you convert even number to a triangular number?

You cannot convert even numbers to triangular numbers! There is no such relationship.


Formula for volume of triangular?

It depends on triangular what: pyramid, dipyramid, prism, ...


Is 39 a triangular number?

No, 39 is not a triangular number. The closet triangular numbers are 36 and 45.


What is the formula for finding the volume for a triangular pyramid?

The formula for finding the volume for a triangular pyramid is half base x height x length. A triangular pyramid has four faces.


Numbers 1 3 6 10 15 pascals triangle?

Well...the fifth row is 1 5 10 10 5 1...but to possibley solve a problem you need a formula for example (x+y)^2 * * * * * No, these are triangular numbers. The formula for the nth term is t(n) = n(n+1)/2 They are called triangular numbers because if you make one mark on the first line, two marks on the second, three on the third, etc you will generate these numbers and with each line the marks form a triangular shape.


How Are Triangular And Cubed Numbers Linked?

The sum of the first n cubed numbers is the square of the nth triangular number.


What are the first 6 triangle numbers?

The first six triangular numbers are : 1,3,6,10,15,21. However, sometimes the first triangular number is regarded as 0 (zero) so you then have 0,1,3,6,10,15 as the first six triangular numbers.


Formula of triangular prism?

Triangular prism = 2 triangles + 3 rectangles.


Are nine and six triangular numbers?

6 is a triangular number, but 9 is not.


Is the number 707 a triangular number?

707 is not a triangular number. The closest triangular numbers to 707 are 703 and 741.


Are hexagonal numbers a subset of triangular numbers?

Yes


What is the formula for the lateral area of a triangular prism?

Length of prism * perimeter of triangular face.


Smaller of two triangular numbers whose sum and difference are also triangular numbers?

The answer would be 15 and 21. The triangular numbers are 1,3,6,10,15,21,28,36,45,55,66,78. 15 plus 21 is 36 which is on the list. 21 minus 15 is 6 and that is on the list as well.


What are the five triangular numbers that follow 21?

The five triangular numbers that follow 21 are 28, 36, 45, 55, and 66.


Is 31 a triangular number?

Nope Triangular numbers are 1,3,6,10,15,21,28,36