| skos:altLabel | - 78
- ''n''(''n'' − 1)/2
- ''n''(''n'' − 1)/2
- Checking every object against every other object
- Triangular
- Triangular number#Triangular root
- Triangular pyramidal number
- Triangular root
- Triangular square number
- last digit of the triangle numbers
- number of total games
- sum of numbers 1 through 11
- total sum
- triangle number
- triangle numbers
- triangular
- triangular figure
- triangular figures
- triangular number
- triangular numbers
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