A University of Tartu student has come up with a new proof of the Pythagorean theorem using origami. While folding paper is already used — even in basic school — to demonstrate the well-known ...

1. Take a rectangular origami paper and fold it in half. 2. Then fold it partially, to make a crease on top. 3. Fold the two upper corners to form a triangle. 4. Now fold both the bottom layers of the ...