only one line
Three
Two intersecting lines can always cover three non-collinear points.
Any three non-collinear points will define a single plane. A plane is composed of an infinite number of distinct lines.
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.
7.
Three
Two intersecting lines can always cover three non-collinear points.
3
Any three non-collinear points will define a single plane. A plane is composed of an infinite number of distinct lines.
One.
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.
7.
only 1 lines can contain 3 collinear points. Maybe you mean coplanar?
As long as at least two of them are different points, exactly one line.
If points m, n, o, and p are arranged such that three of them lie on a straight line, there are two possible scenarios: either three points (e.g., m, n, o) are collinear and the fourth point (p) is not, or all four points are collinear. In the first case, there is one line formed by the three collinear points, and the fourth point can form additional lines with any two of the other three points. Therefore, if only three are collinear, there are multiple lines; if all four are collinear, there is just one line.
There are 91 lines.
15 lines.