blogette: root 2

content/blogette/index.md

@@ -35,3 +35,13 @@ oh yeah if you didn't see it yet I wrote this post over on github called [eleven
 what's the difference between one hambone and another hambone? the first hambone is a Hock, but now there are Tuah them. #chost
 
 sent from my Phone
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+## 2025-07-05
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+today is 7/5 which is a very nice ratio because it's approximately equal to the square root of 2. I think the square root of 2 is a very useful number that doesn't get enough love, probably because it's long to say and doesn't have a funny greek letter. I'm gonna start calling it #root2 to solve that first one. I guess we could make it the letter rho, for root, but that might mean something already, and honestly writing √2 isn't any harder than writing π.
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+i'm sure people have known about the 7/5 approximation for a while now but I just noticed it recently when I realized that the standard size of a US playing card (3.5 x 2.5 inches) is nearly a √2:1 ratio, which means it mimics the A-series of paper (think A4 printer paper) where if you half or double it you get the same aspect ratio. That means if you stick two playing cards together by the long edge, you get something _almost_ the same shape as a playing card, because 7/5 is close to √2 and 10/7 is _also_ close to √2.
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+so I guess if you're in one of those countries that writes the date before the month, you can celebrate root2 approximation day on July 10th :p