Picture -- Movie
A Front side 180, you would be turning heel side.
if you did a front side 50-50, you would be looking at the curb and if you did a frontside 180 out of that 50-50, your nose would have turned away from the curb, going backwards and not forward, your back would now be facing the curb with you riding along fakie.
If you skate regular (Left foot on nose, Right on tail) it is a left 180
If you skate goofy (Left foot on tail, Right on nose) it is a right 180