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If A, B, C have position vectors (0, 1, 1), (3, 1, 5), (0, 3, 3) respectively, show that is right angled at C.

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If A, B, C have position vectors (0,  1,  1), (3,  1,  5), (0,  3,  3) respectively, show that is right angled at C.

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Given Data:

Now the angle C

So angle C is a right angle triangle.

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