Two intersecting lines can always cover three non-collinear points.
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Points are collinear if they are on the same line.
If the points are collinear, that means there's only one straight line. An infinite number of different planes can be drawn that contain one straight line.
None. In ordinary geometry, a line contains an infinite number of points and, by definition, they are all collinear. In projective geometry, however, you can have three lines in the form of a triangle. Each line has only two points on it, so it cannot have 3 points collinear.
only 1 lines can contain 3 collinear points. Maybe you mean coplanar?
Exactly one.