Those are parallel planes.
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No. The planes must either coincide (they are the same, and intersect everywhere), be parallel (never intersect), or intersect in exactly one line.
They're either parallel lines or skew lines.
They are called skew lines. Explanation: In 3 space, parallel lines must never intersect AND must be in the same plane. If they fail to intersect and are in different planes we call them skew lines.
The place where two faces (planes) intersect is called an edge.
No, planes intersect at a line.