1103056005
Level:
A
The cube \( ABCDEFGH \) shown in the picture has edges of length \( a \). Let \( S \) be the midpoint of the diagonal \( CF \). Find the distance between the point \( S \) and the line \( AH \).
\( a \)
\( a\sqrt2 \)
\( a\frac{\sqrt2}2 \)
\( a\sqrt3 \)