Ball off the top of the backboard

[psycho_ref]

What about the sharp edge where the back of the board and the side edge of the board meet??? If it touches that sharp edge, is it not partially touching the back of the board. The ball will rebound towards the baseline. Is this out of bounds.

Here is a case: 7.1.2.

Question (i have only put in the B option fromt he case):
The ball strikes the side edge or top edge of the backboard or pases over the top of the backboard and the ball (came from a pass or try from the front or back of the plane of the backboard.) The ball does not touch any suppporting braces.

Answer:
The ball remains live if it touches the side edge or the top edge if it rebounds and comes down in front of the backboard.

Does this mean that if it comes down behind the backboard (rebounds towards the baseline) it is out of bounds.