Answer: |(a-c) x b| / |b|.
- A |(a-c) . b| / |b|
- B |(a-c) x b| / |b|
- C |a - c|
- D |(a-c) + b| / |b|
Correct answer: B. |(a-c) x b| / |b|
Explanation: For parallel lines (same direction b), shortest distance = |(a-c) x b| / |b|, the perpendicular distance between them.
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