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Specialist2025 NHT Exam 2 Section A · Q17CAS active1 mark

Area of a triangle from two vectors

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Two sides of a triangle are spanned by the vectors $2\tvec{i} + \tvec{j} - 3\tvec{k}$ and $\tvec{i} - 2\tvec{j} + \tvec{k}$ .

The area of this triangle is

1 mark

A

\frac{5\sqrt{3}}{2}

B

5\sqrt{3}

C

5

D

\frac{3\sqrt{10}}{2}

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