Pi day (3-14-2002) Celebration

[thinktank2]

Tommorow is pi day.. let's celebrate it by posting Interesting Information,links etc. here.

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Did you know...Pi day is also the birthday of 'Alert Einstein' ?


Search for a particular string of digits in the first 100 million digits of Pi.
http://www.angio.net/pi/piquery

[sail3005]

we are celebrating this in my school

[[Digital-X-Treme]]

Pi is irrational, and transcendental. Pi^2 is also irrational...

[Judd]

Pi day ? I don't get it

Nothing special about today for people who write their dates correctly !

[STT]

to celebrate pi day, some1 post how mathemetacians arrived at this constant.

[[Digital-X-Treme]]

Originally posted by STT
to celebrate pi day, some1 post how mathemetacians arrived at this constant.

http://mathworld.wolfram.com/Pi.html

[sql_lall]

Wow, i had no idea that Pi day was the birthday of 'Alert Einstein'. In fact, i don't even know who Mr Alert is , though it is an interesting typo.

For those who didn't know:

n *sin(180/n) < Pi < n * tan(180/n)

This gets more and more exact as n increases. (Also, this uses degrees, not radians)

Also, if you write:

|```|    |    |````
|   |    |    |
|___|    |    |----
|        |    |
|        |    |____

(I hope the spaces worked)
and turn it backwards, it looks like 3 1 4!!! Spooky.

[thinktank2]

Originally posted by sql_lall
Wow, i had no idea that Pi day was the birthday of 'Alert Einstein'. In fact, i don't even know who Mr Alert is , though it is an interesting typo.

[jim mcnamara]

Pi day would have been more fun in the year 1519.... except it would have come about 14 days early.

03-14-1519

[sql_lall]

What's up with everyone thinking that pi = 3.141519?
PI = 3.14159!!!!!!!

=> it would have been BEST in 1592 -almost twice
03/14/1592 (MM-DD-YY)
31/4/1592 (DD-MM-YY)-Alas, April only has 30 days. Close!

[jim mcnamara]

Pi isn't really 3.14159 - that's just what programmers use in most calculations involving single precision variables.

Why? measuring anything with accuracy greater than one part in 10^6 is VERY difficult. It's like measuring the diameter of the earth correctly to within one cm. Therefore, you can throw 20 digits of precision into pi and then into the calculation and still not improve the accuracy of the caculation.

[sql_lall]

Yeah, kinda like how to measure the radius of any sphere to within the diameter of a hydrogen atom, all you need to know is the first 15 dec. pl. (Maybe not 15, i think something like it though)

What i was pointing out was the difference between:
3.141519... (what many people think)
3.141592... (the actual value)

[gwdash]

I was fooling around and noticed e^(pi*i) = -1, thus ln -1 = pi * i

Weird...