Pi square is nearly 10

 (mihai.page)

19 points | by freediver 2 hours ago

6 comments

  • lifthrasiir 1 hour ago
    The second fact, pi^2 ~= g, is famous enough that it has a separate section in Wikipedia [1].

    [1] https://en.wikipedia.org/wiki/Mathematical_coincidence#Gravi...

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  • renyicircle 1 hour ago
    My first thought was "well of course it is, since pi is a little larger than 3" but it was cool to see an actual derivation of how much pi squared differs from 10 as a nice, closed form series.
  • leni536 12 minutes ago
    This first became apparent to me when I got a slide rule. Pi is often marked on the various scales and an x^2 scale is often nearby the x scale.
  • verzali 26 minutes ago
    I remember discovering that pi x 10^7 is very close to the number of seconds in a year while at uni.

    One of my tutors was convinced this had to be more than coincidence, but I always figured it was just chance and a nice but sometimes useful shortcut...

  • Lerc 13 minutes ago
    I was a little disappointed that the upper range of gravity on earth only goes to 9.8337. Just a little more and there would have been somewhere on earth that was an exact match.

    It would have been the ideal (if chilly) place to start a cult.

  • smitty1e 1 hour ago
    The author wants tau=2*pi, but in the Greek alphabet, tau has one vertical stroke, and pi has two.

    So, visually in Greek, pi=2*tau would seem an improvement.

    Oh, well.

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