Solution:
A plane is a two Dimensional figure.
The Intersection of two planes that do not coincide is always a line.
Consider two planes ,A and B, Following are the possibilities
1. They may be parallel to each other.→→→ No curve obtained
2. The planes A and B can Coincide with each other.→→→Intersection is a plane.
3. The planes A and B are intersecting.→→→→Intersection is a line.
