Image: Area of parallelogram
The area of a parallelogram with spanned by the vectors $\vc{a}$ and $\vc{b}$ is $$\|\vc{a}\|~\|\vc{b}\|\sin\theta,$$ where $\theta$ is the angle between $\vc{a}$ and $\vc{b}$.
Image file: area_parallelogram.png
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