Collinear [adjective]

Definition of Collinear:

aligned; not curved

Opposite/Antonyms of Collinear:

Sentence/Example of Collinear:

Let A, B, C be any three non-collinear points, then four triangles are defined by these points.

The cross ratio of a range of four collinear points can now be defined as a number characteristic of that range.

The half-lines r and s are collinear, and together form one complete line.

The collinear centres are the three sets of one external and two internal centres, and the three external centres.