Skew lines

Skew lines are lines in space that do not lie in the same plane. Moreover, they are not parallel and they do not intersect.

In the figure below, the red line and the green line are skew lines.

Skew lines

Notice that the red line is not on the same plane as the green line. Notice also that they are not parallel and they will never meet no matter how long you extend the lines.

When you put two lines on the plane, one of two things will always happen.

  • They will intersect 


  • They will be parallel

By definition, skew lines must lie on different planes.


  • They will not intersect 


  • They will not be parallel

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