Question 1115728
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The area of this parallelogram is equal to the length of the vector in 3D space, which is the vector product of the given vectors.


If this hint is enough for you, then everything is OK.



If it is not enough, look into examples in this site


https://math.stackexchange.com/questions/1334271/finding-the-area-of-the-parallelogram-spanned-by-vectors