Answer: The largest of the three pairwise distances equals the sum of the other two.
- A They lie in the same octant of the coordinate system
- B The largest of the three pairwise distances equals the sum of the other two
- C All three pairwise distances are equal to one another
- D Their coordinates sum to zero in each of the three components
Correct answer: B. The largest of the three pairwise distances equals the sum of the other two
Explanation: Collinearity forces one point to lie between the others, so the longest distance is exactly the sum of the two shorter ones.
Concept context
Coordinate axes and planes in space, octants, distance between two points, and the section formula
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