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](https://s3.amazonaws.com/si.experts.images/answers/2024/06/6661269fc3852_9116661269fb1188.jpg)
![C[3, 3, -4]. Show that this triangle is a right-angle triangle](https://s3.amazonaws.com/si.experts.images/answers/2024/06/666126a0062c1_9116661269fea92b.jpg)
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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