
Free triangular number clipart & printables for teachers
10 free printable triangular number clipart, diagrams and worksheet images for the classroom — labelled, free under CC BY-NC 4.0.

Triangular Number — T(10) = 55

Triangular Number — T(1) = 1

Triangular Number — T(2) = 3

Triangular Number — T(3) = 6

Triangular Number — T(4) = 10

Triangular Number — T(5) = 15

Triangular Number — T(6) = 21

Triangular Number — T(7) = 28

Triangular Number — T(8) = 36

Triangular Number — T(9) = 45
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