right-handed system of vectors

Three ordered non-coplanar vectors $\overrightarrow{u}$, $\overrightarrow{v}$ and $\overrightarrow{w}$, which have a common , are said to form a right-handed or dextral system (Latin dexter = ), if a right-threaded screw rotated through an angle less than ${180}^{\mathrm{o}}$ from $\overrightarrow{u}$ to $\overrightarrow{v}$ will advance in the direction of $\overrightarrow{w}$.  For instance, the usual basis vectors $\overrightarrow{i}$, $\overrightarrow{j}$ and $\overrightarrow{k}$ form a dextral system.

Figure 1: A right-handed system of vectors