Explanation: Perpendicular lines are defined as being co-planar, so therefore they always have to be co-planar or else they would be skew.

Can perpendicular lines be non coplanar?

Two lines in the same plane either intersect or are parallel. If two lines intersect and form a right angle, the lines are perpendicular. Skew lines are lines that are non-coplanar and do not intersect. ... Two planes are perpendicular if they intersect and form a right angle.

Are parallel lines coplanar?

Technically parallel lines are two coplanar which means they share the same plane or they're in the same plane that never intersect.