The circles could be in 2 planes that are parallel to each other. Lines and planes can be parallel. Lines of latitude are examples of circles that are in parallel planes.
parallel planes
There is no "the" since there are infinitely many non-parallel planes. Two non-parallel planes are planes that intersect in a line.
Parallel planes.
No. Consider two adjacent faces on a cuboid. Both planes are parallel to the edge at which the intersect. But the fact that they do intersect illustrates that they are not parallel.
parallel
Those are parallel planes.
Parallel lines are two 1-dimensional objects that do not meet. Parallel planes are two 2-dimensional objects that do not meet.
No. By definition, planes can be extended in all directions to infinity. If they are not parallel, they will intersect somewhere.
parallel lines are used in the white house. The columns holding it up are parallel lines and the floor and the roof of a room are parallel planes as long as they are the same shape
A plane midway between the two given planes and parallel to them.
No