Matsuyama Paradox Puzzle

The 4 main pieces form a square in one configuration.  When rearranged, the 4 pieces apparently form the same square with one piece missing.   The secret of this puzzle involves Fibonacci numbers. A very good, brief explanation with references can be found here:  https://en.wikipedia.org/wiki/Missing_square_puzzle.

The link also shows a related puzzle called the Missing Square Puzzle for which I have also made a 3d model.

I’ve printed with PLA and PETG (no supports) with varying amounts of shrinkage but that shouldn’t take away from the illusion.  There’s another excellent representation of the Matsuyama Paradox Puzzle by Extrutim (Matsuyama Paradox Puzzle Game).