. . . "triangular figure" . . "Triangular number" . . "''n''(''n'' \u2212 1)/2" . . . "Triangular" . . . "Checking every object against every other object" . . . "triangular" . "last digit of the triangle numbers" . . . "Triangular square number" . "''n''(''n'' − 1)/2" . "triangle numbers" . . . "triangle number" . . . . . "Triangular root" . . . "triangular numbers" . . . "Triangular number#Triangular root" . "Triangular pyramidal number" . . "78" . . "triangular number" . "Triangular number" . . "number of total games" . "sum of numbers 1 through 11" . . "triangular figures" . "total sum" . . .