Answer: Collinear.
- A Vertices of an equilateral triangle
- B Vertices of a right triangle
- C Coincident
- D Collinear
Correct answer: D. Collinear
Explanation: AB = BC = √3 and AC = 2√3, so AB + BC = AC - the points lie on a straight line.
Concept context
Coordinate axes and planes in space, octants, distance between two points, and the section formula
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