MAtHS!!!!!?

stevey226: MAtHS!!!!!?
Can someone actualy explain to me what a triangle number is i know that it is 1+2+3+4ect… but i need to know why they are called it.

Thanks,
~Steven~

Answers and Views:

Answer by Jeff Lebowski
Triangular numbers are
1,3,6,10, 15…

You can create a triangle with each amount of numbers
* (1)

* * (3)
*

* * * (6)
* *
*

* * * * (10)
* * *
* *
*

* * * * * (15)
* * * *
* * *
* *
*

Answer by j.investi
it is the sum of the numbers from 1 up to n. Triangular numbers are so called because they describe numbers of balls that can be arranged in a triangle.

Answer by Cam B
The triangle numbers are called that because you can make triangles with rows of 1 then 2 then 3…. etc. and they look cool.

Yahoo Answers won’t let you draw them, but just search triangle numbers and you will see the triangles.