Perpendicular lines are intersecting lines

Answer 1

Form right angles

Answer 2

Yes - in common usage they are but they need not be.

If you are sitting in a cuboid room, facing a wall, then consider the line formed by the floor and the opposite wall, and the line formed by the walls behind you and one of the adjacent walls. These two lines are at right angles to one another but, because they are in different planes, they will not intersect.

Answer 3

Perpendicular lines are not intersecting. Perpendicular means to not cross.

Answer 4

Not necessarily. Lines can intersect at any angle. They are only perpendicular when they intersect at 90 degree angles.

Answer 5

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