Show that the line segments joining the points

MATHEMATICS · Subjective · CBSE · Mathematics · Three-Dimensional Geometry · Three-Dimensional Geometry

Problem

Show that the line segments joining the points (4,7,8)(4, 7, 8), (−1,−2,1)(-1, -2, 1) and (2,3,4)(2, 3, 4), (1,2,5)(1, 2, 5) intersect. Verify whether the four points concyclic.

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