The square root of two (numberphile video)

"If you come up with an idea which is right, but goes againt conventional wisdom, you can be sent to a desert island, or burnt at the stake, or executed, because people don't like their ideas about how the world should be upset. even if you can disprove that it's not a good idea to urinate towards the Sun."

I bet that Teabaggers wouldn't like this guy.

I figured out the stuff on A paper sizes nearly twenty years ago when I selling photocopiers but don't recall why I bothered to do so.

U.S. paper sizes are currently standard in the United States, the Philippines and Chile.



Imperial units of measurement are currently standard in the United States, Burma and Liberia.



No offense to the Philippines, Chile, Burma and Liberia, but c'mon!

Halvable paper sizes have sides in ratio 1.414 to 1.

This means when halved the paper is .707 to 1, or, turned round, 1 to .707, which is the same as 1.414 to 1.

So A0 when halved is A1, then A2 etc - useful for photocopying and printing.

You may have missed this point, which, after all, was not specifically mentioned.

http://en.wikipedia.org/wiki/ISO_216

... for anyone sufficiently interested.