Quote Originally Posted by Universal Mind View Post
It's still a side even though the two rectangles together form another rectangle. There are proofs based on that principle.
Yeah? Does it have anything to do with any "infinitely" small space between the two shapes?

My example was more metaphorical I guess.

Quote Originally Posted by Universal Mind View Post
Trick photography.
It would be interesting also to physically build something similar to that, yet have it as a visual illusion at a specific angle.