the trangualar number starts from 1, it's the first triangular number.
and to get the second traingular number, we add 2 to the first number (1 + 2) which is 3.
the same way, to get the third number, we need to add 3 to the second number, so (3 + 3), we have 6.
and the forth number, is the third number + 4, (6 + 4) = 10.
I think the reason why they call it triangular number is, when we dispaly only one traingular number at one line and put it at the end of the line, the shape we get looks like a triangle.
https://www.youtube.com/watch?v=X3_h4w3jVsk
https://en.wikipedia.org/wiki/Triangular_number
1
2 3
4 5 6
7 8 9 10
the trangualar number starts from 1, it's the first triangular number.
and to get the second traingular number, we add 2 to the first number (1 + 2) which is 3.
the same way, to get the third number, we need to add 3 to the second number, so (3 + 3), we have 6.
and the forth number, is the third number + 4, (6 + 4) = 10.
I think the reason why they call it triangular number is, when we dispaly only one traingular number at one line and put it at the end of the line, the shape we get looks like a triangle.
I hope my explaination will help you :)
Same smh
Can someone futher explain what a triangular number is? I don't fully understand it.