Part 2/6:
The charm of A4 lies in its unique proportions. If one were to cut an A4 sheet in half, the resulting pieces would maintain the same ratio of dimensions as the original sheet. This is a clever design feature that stems from the mathematical ratio of the short side to the long side being the square root of two (√2). This intriguing number is not only rational but exhibits infinite complexity, lacking any repeating patterns after the decimal point—an attribute that many find aesthetically pleasing.