Here’s an update to an old post. I’ve just switched the picture and replaced it with a higher res version. New post coming up in a second…
Lines A-B and C-D in the picture below are of the same length. You don’t believe me? That’s fine, go ahead and measure them for yourself! For more illusions of this type, be sure to check “Flower Illusion” and “2 Arrows”.
P.S. Previous picture included only lines A-B and A-C (old comments refer to that)