In a 30-60-90 triangle where the long leg is 12 what is the length of the short leg?

The length of short leg##=6.928##
##30^o##-##60^o##-##90^o## is a special kind of right-triangle in which sides exist in ratio ##SL:LL:H = 1:sqrt(3):2##
where
##SL=##Short Leg
##LL=##Long Leg
##H=##Hypotenuse
The side-lengths can also be calculated with these relations
##SL=1/2H## or ##SL=1/sqrt3LL##
##LL=sqrt3/2H## or ##LL=SLsqrt3##
Therefore if ##LL=12##
##SL=1/sqrt3xx12=4sqrt3=6.928##