2010015801

Let $ABCDEF{A}^{\prime }{B}^{\prime }{C}^{\prime }{D}^{\prime }{E}^{\prime }{F}^{\prime }$ be a regular hexagonal prism with the base edge length of $4\mathrm{cm}$ and the height of $6\mathrm{cm}$. Find the distance between the lines $FA$ and $D^{\prime }{C}^{\prime }$ (see the picture).