-- A line has no plane and no part of one.
-- Regarding a plane, go back and look at that word "half" again.
2
two
-- An infinite number of different planes can intersect the same line. -- The same line can lie in an infinite number of different planes. -- An infinite number of different lines can intersect the same plane.
If I understand the grammar correctly, the answer is one line.
yes, it may be the two plane intersect at one line or the two planes are coincident.
Yes because a line can lie in many planes so one we add one point not on that line, we define a unique plane.
Just 1 1 plane is simply a never ending line with absolutely no width or height. 2 planes would be a flat surface with no height
Think you just answered your own question. A plane is a line. Two planes= two lines.
They define one plane. A line is defined by two points, and it takes three points to define a plane, so two points on the line, and one more point not on the line equals one plane.
Always; although that line can lie in infinitely many planes.
There is only one such plane.
If points A, B, and C are not on the same line, they determine a single plane.