A square can be folded in four different ways so that its edges match. How many axes of symmetry does it have?

1. Each fold that makes the edges match is one axis of symmetry. 2. A square folds along two midlines and two diagonals, giving four folds. 3. Two is the count for a non-square rectangle, and eight counts all symmetry motions including turns. _Source: Wikipedia, Reflection symmetry, section Symmetric function_