Yes.
Chat with our AI personalities
parallel planes
No. Two planes may be parallel and so may not intersect. Also, any line is the intersection of infinitely many planes, not just two.
Yes. If two planes are not coincident (the same plane) and are not parallel, then they intersect in one straight line.
There is no "the" since there are infinitely many non-parallel planes. Two non-parallel planes are planes that intersect in a line.
No, they may also be parallel.