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NDA Math Three Dimensional Geometry

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For the next three (03) items that follow:
The vertices of a triangle ABC are A(2, 3, 1), B(-2, 2, 0) and C(0, 1, -1).

[NDA I 2014]

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Question : 88

Total: 92

What is the area of the triangle?

6√2 square units
3√2 square units
10√3 square units
None of the above

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