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Q. The area of the quadrilateral $A B C D$, when $A(0,4,1)$, $B(2,3,-1)$, $C(4,5,0)$ and $D(2,6,2)$ is equal to

KCETKCET 2021Vector Algebra

Solution:

$\frac{1}{2}(\overline{ AC } \times \overline{ BD })=9$ sq. units