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Show that the vectors 2i - j + k , i - 3j - 5k & 3i - 4j - 4k form a right angled triangle.

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Show that the vectors 2i - j + k , i - 3j - 5k & 3i - 4j - 4k form a right angled triangle.

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therefore, vector (a, b & c) forms a right angled triangle. 

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