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? 2322 / 3267 19.6.2020

ISO Paper Size Golden Spiral

The ISO 216 standard ratio is cos(45°), but American letter paper is 8.5x11 because it uses radians, and 8.5/11 = pi/4.
Alt-Text (der eigentliche Witz)
The ISO 216 standard ratio is cos(45°), but American letter paper is 8.5x11 because it uses radians, and 8.5/11 = pi/4.
xkcd von Randall Munroe – Original auf xkcd.com CC BY-NC 2.5