1.Recall that skew lines are lines that do not lie on the same plane, never intersect, or parallel. This means that skew lines are never coplanar and instead are noncoplanar.
2.In three-dimensional geometry, skew lines are two lines that do not intersect and are not parallel. A simple example of a pair of skew lines is the pair of lines through opposite edges of a regular tetrahedron.
3.Two lines are parallel lines if they are coplanar and do not intersect. Lines that are not coplanar and do not intersect are called skew lines. Two planes that do not intersect are called parallel planes.
