更多collinear例句

1. Let A, B, C be any three non-collinear points, then four triangles are defined by these points.
2. The cross ratio of a range of four collinear points can now be defined as a number characteristic of that range.
3. The half-lines r and s are collinear, and together form one complete line.
4. The collinear centres are the three sets of one external and two internal centres, and the three external centres.