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Using vectors find the area of the triangle with vertices A(1, 1, 2), B (2, 3, 5) and C(1, 5, 5)

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Using vectors find the area of the triangle with vertices A(1, 1, 2), B (2, 3, 5) and C(1, 5, 5)

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A (1, 1, 2), B (2, 3, 5), C (1, 5, 5)

Position vector of vertices A, B, C are

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