You are at the section Fun With Math-Triangulars
Fun With Math-Triangulars
A Triangular is where you add the first n natural numbers to form a sum.
0? = 0
1? = 1 = 1
2? = 1 + 2 = 3
3? = 1 + 2 + 3 = 6
4? = 1 + 2 + 3 + 4 = 10
5? = 1 + 2 + 3 + 4 + 5 = 15
6? = 1 + 2 + 3 + 4 + 5 = 6 = 21
To put it this way:
1 +2=
3 +3=
6 +4=
10 +5=
15 +6=
21...
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