From: "John Beamish" 

I knew there was a ratio; I knew there was something about folding.  Thanks
for putting it all together.

"John Beckett"  wrote
in message news:409a28cb.8696585{at}216.144.1.254...
>
> I am rather fond of A4 paper. You probably know the story, but for the
> benefit of our imperial friends I will spare no details...
>
> An A0 sheet of paper is one square meter in a rectangle with sides
> proportioned so that if you fold the sheet of paper in half (halving the
> long side), the result has sides in the same proportion.
>
> Doing the maths shows that the long side is sqrt(2) times longer than the
> short side.
>
>

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