Question: 9. The points A [-1, 1, 1], B[2, 0, 3], and C[3, 3, -4]. Show that this triangle is a right-angle triangle

 9. The points A [-1, 1, 1], B[2, 0, 3], and

C[3, 3, -4]. Show that this triangle is a right-angle triangle

9. The points A [-1, 1, 1], B[2, 0, 3], and C[3, 3, -4]. Show that this triangle is a right-angle triangle

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