A line is.
A straight line.
The intersection of two planes is one straight line.
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.
A line is.
A straight line.
line
The intersection of two planes is one straight line.
A line.
A straight line, and nothing else.
Yes. A line can be the intersection of two planes, or any number of planes. A real-world example would be the central axis (axle) of a paddlewheel on a steamboat, which would be coplanar with all of the planes represented by the individual paddles. A single line is similarly the intersection of perpendicular planes.
It is the intersection of two planes or the line joining two vertices.
A line or a ray - depending on whether the planes are finite or infinite.
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.