XKCD Comic : ISO Paper Size Golden Spiral

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XKCD Comic : ISO Paper Size Golden Spiral
« on: June 20, 2020, 12:01:32 pm »
ISO Paper Size Golden Spiral
19 June 2020, 5:00 am

The ISO 216 standard ratio is cos(45°), but American letter paper is 8.5x11 because it uses radians, and 11/8.5 = pi/4.

Source: xkcd.com


 


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