You can get from A to the last figure in two moves (assuming stacking is allowed), and you can get from three to A in 3 moves.
If stacking isn't allowed, you can still get from A to the last in two moves, one of those two moves being to flip the extra triangle off the 'board'.
I think this is it: with a repeating pattern of 3 moves: 2 moves, A fits the missing square, whether you allow stacking or the extra triangle is flipped off the figure.