Answer: Dihedral angle between the planes.
- A The normal vectors of each individual plane
- B Dihedral angle between the planes
- C The lines of intersection between the planes
- D The direction cosines of the planes' normals
Correct answer: B. Dihedral angle between the planes
Explanation: The angle bisector planes of two intersecting planes divide the dihedral angle between them into two equal halves. There are two such bisector planes.
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