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The points (2, 3, 4), (-1, -2, 1) and (5, 8, 7) are:
Aon one straight line
Bvertices of a right triangle
Cvertices of a scalene triangle
Dvertices of an obtuse triangle
Answer & Solution
Correct answer: A. on one straight line
Direction ratios from the first point are -3, -5, -3 and 3, 5, 3, which are proportional, so the points lie on one line.
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