a line has to have at least 2 points.
a plane has to have at least 3 points.
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It takes two points to define a unique line in Euclidean space. But every line and every line segment contains infinitely many points. The same is true for planes in Euclidean space. You need at least 3 points to define a unique plane, but every plane containes infinitely many points and infinitely many lines or line segments.
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A line has an infinite amount of points.
Points are collinear if they are on the same line.
If 2 points determine a line, then a line contains infinitely many planes.
depend how many points are them
2 points