What is the magnitude of $2\hat{i} - 3\hat{j} + 6\hat{k}$?

Explanation

1. 01

   $\lvert a\hat{i} + b\hat{j} + c\hat{k} \rvert = \sqrt{a^{2} + b^{2} + c^{2}}$.

2. 02

   $\sqrt{4 + 9 + 36} = 7$.