That's O, the origin, by definition.
A line. When two planes intersect, their intersection is a line.
The intersection of two planes is never a point. It's usually a line. But if the planes have identical characteristics, then their intersection is a plane. And if the planes are parallel, then there's no intersection.
If there are two unique, non-parallel planes in space, they will intersect, and their intersection will be a line.
ONLY a line can be formed by the intersection of two planes...and always.
architects use coordinate planes to graph where they want the rooms to be
The intersection of two distinct planes is a line. The set of common points in the line lies in both planes.
The intersection of 2 non-parallel planes is always a line.The intersection of 3 planes doesn't have to be a line, but it can be. If it is,then there are an infinite number of other planes that can also intersect thosethree along the same line.
It is a line.
The intersection of two planes is a line.
Yes, almost all the time. And when it is not coordinate planes it is coordinate hype-spaces (more than just the 2 dimensions that the coordinate plane allows).
Yes, they are.
origin