Assertion: triangle's number | /r/HasProperty | equal
Facets:
value: less the number
type: OTHER
value: in a tournament format
type: OTHER
Source sentences:
text: The symmetry of the triangle implies that the nth d-dimensional number is equal to the dth n-dimensional number.
text: The nth triangular number is the number of dots in the triangular arrangement with n dots on a side, and is equal to the sum of the n natural numbers from 1 to
text: n th triangular number is equal to the sum of the first n cube numbers.
text: In a tournament format that uses a round-robin group stage, the number of matches that need to be played between n teams is equal to the triangular number T n − 1 .
text: The number (counted with multiplicity) of points on the edge of the remaining shape and points on the edges of the right angled triangles is equal to the sum of the number of points on the edge of the rectangle, of twice the points (counted without multiplicity) newly on an edge, and of twice the number of right angled triangles (to reflect the effect of multiple counting of the verices on the diagonals of the right angled triangles).
text: The number of points inside the the remaining shape and inside the right angled triangles is equal to the number of points inside the rectangle less the number (counted without multiplicity) newly on an edge.