# What is the area of the parallelogram having diagonals $3\bar{i}+\bar{j}-2\bar{k}\;and\;\bar{i}-3\bar{j}+4\bar{k}$?
$\begin{array}{1 1} 5 \sqrt 3 \\ 10 \sqrt 3 \\ 8 \\ 4 \end{array}$