Posted By:
JoannI think the slant cut at the top may be approximately matched by the reverse slant cut at the bottom. To me, if the two edges are parallel to each other I'm less inclined to think trimmed, even if they are not parallel to the image border. It's when one edge is slanted to the image but the opposite edge is square to the image that I figure trimming.
This one looks close, but I think I see a roughly corresponding angle on the bottom.
J