Answer
$SV = 2 \sqrt 3 \\ VT = 4\sqrt{3}$
Work Step by Step
We find VT and SV using proportions:
$ \frac{18}{12} = \frac{6\sqrt{3}}{VT} \\ VT = 4\sqrt{3}$
SV is half of VT, so $SV = 2\sqrt{3}$.
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