Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Happy PI Day 2010

  1. Mar 14, 2010 #1

    Borg

    User Avatar
    Science Advisor
    Gold Member

    I went to Google this morning and found out that today is http://www.cnn.com/2010/TECH/03/12/pi.day.math/" [Broken]. :biggrin:


    piday10-hp.gif
     
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Mar 14, 2010 #2
  4. Mar 14, 2010 #3

    Danger

    User Avatar
    Gold Member

    Last edited by a moderator: May 4, 2017
  5. Mar 14, 2010 #4
    It's pi day because it's 3-14.

    I believe that means it's not pi day in foreign countries because they put the day of the month first.

    And, since there's no month 14, there will never be a pi day in foreign countries.

    Or is that just circular reasoning?
     
  6. Mar 14, 2010 #5

    Gokul43201

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    Last edited by a moderator: May 4, 2017
  7. Mar 14, 2010 #6

    Danger

    User Avatar
    Gold Member

    Arrrggghhhh... :rolleyes:

    Exactly. Cakes are square; pie are round. :biggrin:
     
  8. Mar 14, 2010 #7

    Gokul43201

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    To be intentionally obtuse, that's not circular, but incomplete. Completeness, within this particular argument, would also require you to note that April never has 31 days.

    Of course, Jan 3rd is really not so terrible, but just doesn't have enough zing in it.
     
  9. Mar 14, 2010 #8

    Borg

    User Avatar
    Science Advisor
    Gold Member

    Hmm. 3-14-15 will be PI year.
     
  10. Mar 14, 2010 #9
    Sure there will. We just do it on 22/7 (22nd of July) which is actually closer to pi than 3.14. Alternatively people have been known to do it on the 314th day of the year, but I can never remember when that is and I don't reckon it's that popular except for people who want an extra chance to celebrate pi day.
     
  11. Mar 14, 2010 #10
  12. Mar 14, 2010 #11
    happy Pi-nstein day!
     
  13. Mar 14, 2010 #12
    I have a problem with pi. Pi was arbitrarily chosen to be the ratio of circumference over diameter thousands of years ago. But as most problems in math and physics are solved in term of radius than diameter, there is more elegance for pi to be circumference over radius (6.28318). It represents a full 360 degree revolution, and not 180.
     
  14. Mar 14, 2010 #13

    Moonbear

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    Happy pi day! I found the perfect square pie to celebrate. :biggrin:

    3063024748_7d252abc83.jpg
     
  15. Mar 14, 2010 #14
    And it's too close to New Years.
     
  16. Mar 14, 2010 #15
    That's not pie, it's...

    spam.jpg
     
  17. Mar 14, 2010 #16
    Just think how hard they partied on 3/14/1592
     
  18. Mar 14, 2010 #17
    Shouldn't pi day be tomorrow? It rounds up to 3.15
     
  19. Mar 14, 2010 #18

    Moonbear

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    How? 3.141...rounds down.
     
  20. Mar 14, 2010 #19

    Matterwave

    User Avatar
    Science Advisor
    Gold Member

    Some of the calculations are done by infinite series approximations. There are proofs that some infinite series converge to the value pi. One can then calculate these infinite series to many many terms and get a good approximation of pi (the faster the series converges the better).

    Another method would be to make more and more sided polygons and measuring the perimeter vs "radius" of these polygons. If you get a polygon with 1 billion sides, you get a pretty good approximation of pi as well.
     
  21. Mar 14, 2010 #20
    Oh never mind(well, atleast I know pi is 3-ish). :redface:
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Happy PI Day 2010
  1. Happy PI Day! 2009 (Replies: 23)

  2. Happy Pi Day 2010 (Replies: 2)

  3. Happy PI day! 2013 (Replies: 9)

  4. Happy Pi Day 2017 (Replies: 7)

Loading...