## Enter triangular number statement

Calculate triangular number 45

Triangular numbers form a triangle shape

##### Triangular number formula

 Tn  = n(n + 1) 2

##### Given n = 45, we have:

 T45  = 45(45 + 1) 2

 T45  = 45(46) 2

 T45  = 2070 2

T45 = 1,035

##### How does the Triangular Number Calculator work?
Free Triangular Number Calculator - This calculator determines the nth triangular number. Generates composite numbers.
This calculator has 1 input.

### What 1 formula is used for the Triangular Number Calculator?

Tn = n(n + 1)/2

For more math formulas, check out our Formula Dossier

### What 4 concepts are covered in the Triangular Number Calculator?

formula
a fact or a rule written with mathematical symbols. A concise way of expressing information symbolically.
number
an arithmetical value, expressed by a word, symbol, or figure, representing a particular quantity and used in counting and making calculations and for showing order in a series or for identification. A quantity or amount.
triangle
a flat geometric figure that has three sides and three angles
triangular number