Cross Product & Area Problems

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Try the first 5 questions

1.
If **a** = 2**i** + **j** - **k** and **b** = **i** - **j** + **k**, then **a** x **b** is:
2.
The area of the parallelogram with sides **a** = **i** + 2**j** + 3**k** and **b** = 3**i** - 2**j** + **k** is:
3.
The area of the triangle with vertices A(1,1,1), B(1,2,3), C(2,3,1) is:
4.
For what value of lambda are vectors **a** = 2**i** + lambda**j** + **k** and **b** = **i** + 2**j** + 3**k** parallel?
5.
The value of **i** x (**j** + **k**) is:

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