Answer: Coincident planes.
- A Intersecting perpendicular planes
- B Coincident planes
- C Parallel planes (not the same)
- D Perpendicular planes
Correct answer: B. Coincident planes
Explanation: Normals are (1,2,3) and (2,4,6) = 2(1,2,3): proportional. So planes are parallel. But d values 4 and 5/2 are not equal, so they are distinct parallel 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