Final answer:
Parallel lines in geometry do not intersect, and when triangular faces are parallel to each other, they do not intersect on the same plane, as seen in figures like prisms.
Explanation:
Parallel lines are lines in a plane that do not intersect. In geometry, when triangular faces are parallel to each other, it means that the faces do not intersect each other on the same plane. This property is found in geometry figures such as prisms where the opposite faces are parallel to each other.
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