Calculate triangular number 9
Triangular numbers form a triangle shape
Triangular number formula
| Tn = | n(n + 1) |
| 2 |
Given n = 9, we have:
| T9 = | 9(9 + 1) |
| 2 |
| T9 = | 9(10) |
| 2 |
| T9 = | 90 |
| 2 |
T9 = 45
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.
This calculator has 1 input.
What 1 formula is used for the Triangular Number Calculator?
Tn = n(n + 1)/2
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
