Answer: Skew lines.
- A Coincident lines
- B Perpendicular lines
- C Coplanar lines
- D Skew lines
Correct answer: D. Skew lines
Explanation: Skew lines are non-coplanar lines that do not intersect and are not parallel. They can only exist in 3D.
Three mutually perpendicular axes x, y, z meeting at the origin O, with a point P located by its (x, y, z) coordinates.
Concept context
Lines and planes in 3D space, direction cosines, distances, and angles