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Question
Write the expression for the area of the parallelogram having \[\vec{a} \text{ and } \vec{b}\] as its diagonals.
Solution
\[\text{ Given:} \vec{a} \text{ and } \vec{b} \text{ are diagonals of a parallelogram } .\]
\[\text{ Area of the parallelogram } =\frac{1}{2}\left| \vec{a} \times \vec{b} \right|\]
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