Answer: Along the normal to the plane.
- A Parallel to the plane
- B Along the normal to the plane
- C In the plane
- D At 45 degrees to the normal
Correct answer: B. Along the normal to the plane
Explanation: A line is perpendicular to a plane if its direction vector is parallel to the normal vector of the plane.
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