Is there a real-world situation where replacing a square with a rectangle would cause big problems?

My friend jokingly claimed that, to him, all rectangles can be classified as squares. I was wondering if there is anything that requires a square to f

My friend jokingly claimed that, to him, all rectangles can be classified as squares. I was wondering if there is anything that requires a square to function, and changing that would be serious? (Imagine all the squares in the world suddenly stretch out and become rectangles; Where might that cause serious, real-world problems?)

or:My friend jokingly claimed that, to him, all rectangles can be classified as squares. I was wondering if there is anything that requires a square to function, and changing that would be serious? (Imagine all the squares in the world suddenly stretch out and become rectangles; Where might that cause serious, real-world problems?)

or:Awkward dice... Even though squares are rectangles so practically squares could stay the same size and shape and still be a rectangle

or:Ha, you'd like that, wouldn't you? No Pythagoras anymore ,,,

Tags:wondering,classified,