Geometry Question?

Question

If two planes intersect, will they always or just sometimes form a line?

thanks for the help

Answer 1

That depends upon definitions. In general it is always. If the planes are defined with boundaries, then the place of intersection could be a single point and not a line. Such a case is very unusual. Go with always. Teachers aren't that mean. Planes usually aren't defined so.

Answer 2

Two intersecting planes - perfectly flat surfaces - must always form a line where they intersect.

Answer 3

if its between always or sometimes then the answer is always