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Find the area of a triangle having the p...

Find the area of a triangle having the points`A(1, 1, 1)`, `B(1, 2, 3)`and `C(2, 3, 1)`as its vertices.

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The correct Answer is:
`=(sqrt(21))/(2)` sq. units.
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MODERN PUBLICATION-VECTOR ALGEBRA -Frequently Asked Questions (Example)
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