Question: Use vectors to decide whether the triangle with vertices P(3,-4,-1),Q(4,-1,-3), and R(8,-3,-4) is right-angled.Yes, itis right-angled.No,itis not right-angled.

Use vectors to decide whether the triangle with vertices P(3,-4,-1),Q(4,-1,-3), and R(8,-3,-4) is right-angled.Yes, itis right-angled.No,itis not right-angled.

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