PDA

View Full Version : Pi for everyone!



Eloel
2011-03-14, 03:28 PM
Happy pi day to all playgrounders!
Pi wouldn't be pi without you guys.

Happy Pi day to you,
Happy Pi day to you,
Happy Pi day everybody,
Happy Pi day to you.

Ranger Mattos
2011-03-14, 03:35 PM
http://ja0hxv.calico.jp/pai/epivalue.html

The first trillion digits of pi. Have fun.

Haruki-kun
2011-03-14, 03:46 PM
http://i288.photobucket.com/albums/ll190/Haruki-san/Piruki.png

I love Pi! :smalltongue:

averagejoe
2011-03-14, 03:50 PM
This seems appropriate:

http://infosthetics.com/archives/funny_pie_chart2.jpg

Happy pie day everyone.

Eldan
2011-03-14, 03:53 PM
Ah, you Americans and your amusing mispronunciation of "pi" :smalltongue:

Still. More accurate graphs would probably not be forum appropriate.

Ravens_cry
2011-03-14, 03:54 PM
Another great Pi Day is July 22nd. But any excuse for pie and irrationality is good enough for me!:smallbiggrin:

Dvil
2011-03-14, 04:01 PM
I'm English, so unfortunately no Pi day for me :smallfrown:

averagejoe
2011-03-14, 04:02 PM
I'm English, so unfortunately no Pi day for me :smallfrown:

Eh, what's all this about?

Astrella
2011-03-14, 04:07 PM
Eh, what's all this about?

The UK and a lot of other countries in Europe us dd/mm/yy rather then mm/dd/yy, so it's 14/03 for us, rather then 03/14.

averagejoe
2011-03-14, 04:11 PM
The UK and a lot of other countries in Europe us dd/mm/yy rather then mm/dd/yy, so it's 14/03 for us, rather then 03/14.

Ah, I see. The pedant in me likes that numbering system, since it's least to most. But it seems like you guys don't have a pi day, since there's no fourteenth month! :smalleek:

Haruki-kun
2011-03-14, 04:20 PM
Ah, I see. The pedant in me likes that numbering system, since it's least to most. But it seems like you guys don't have a pi day, since there's no fourteenth month! :smalleek:

If there was an April 31st they could. Too bad.

Although Pi day is also celebrated on November 10 by some people for being the 314th. day of the year. Nov, 9 in leap years. :smalltongue:

Dvil
2011-03-14, 04:23 PM
Ah, I see. The pedant in me likes that numbering system, since it's least to most. But it seems like you guys don't have a pi day, since there's no fourteenth month! :smalleek:

See, I prefer it, because a date that I'd pronounce "The 14th of March" is written 14/03. Nice and simple.

Haruki-kun
2011-03-14, 04:32 PM
See, I prefer it, because a date that I'd pronounce "The 14th of March" is written 14/03. Nice and simple.

I prefer it, too. But people here (Mexico) don't really have a set way to write it. It usually varies.

Crow
2011-03-14, 04:34 PM
I'm used to; 14MAR2011

averagejoe
2011-03-14, 04:35 PM
If there was an April 31st they could. Too bad.

Although Pi day is also celebrated on November 10 by some people for being the 314th. day of the year. Nov, 9 in leap years. :smalltongue:

Okay. So there's American pie day, British pie day, and November pie day. That's three days where I have an excuse to eat pie. :smallbiggrin:

Dire Moose
2011-03-14, 05:04 PM
Happy 3.141592653589793238462643383279502884197169399375 105820974944593
07816406286208998628034825342117067982148086513282 306647093844609
55058223172535940812848111745028410270193852110555 964462294895493
03819644288109756659334461284756482337867831652712 019091456485669
23460348610454326648213393607260249141273724587006 606315588174881
52092096282925409171536436789259036001133053054882 046652138414695
1941511609 day, everyone!

Also, obligatory link (http://www.newgrounds.com/portal/view/70212).

Atreyu the Masked LLama
2011-03-14, 05:26 PM
I'm ready for pi day this year!! Behold the Pi llamatar!!


http://i74.photobucket.com/albums/i278/wolfshonor/llamas/pi-llama.gif

P.S. Ruki, that's an awesome avatar!!!

Dogmantra
2011-03-14, 06:08 PM
But it seems like you guys don't have a pi day, since there's no fourteenth month! :smalleek:

We can do the incredibly classy 22/7.
It is so classy that one time it was mistaken for a large school.

averagejoe
2011-03-14, 08:29 PM
I'm ready for pi day this year!! Behold the Pi llamatar!!


http://i74.photobucket.com/albums/i278/wolfshonor/llamas/pi-llama.gif

P.S. Ruki, that's an awesome avatar!!!

That is pretty great.

MoonCat
2011-03-14, 09:11 PM
I made a square pie (pi r 2) for math class.

Ranger Mattos
2011-03-14, 09:20 PM
We can do the incredibly classy 22/7.
It is so classy that one time it was mistaken for a large school.

But pi is not equal to 22/7.

π = 3.141592654...
22/7 = 3.142857143...

The underlined parts are not the same.

Hm, it seems that GiantITP does not like my use of the pi symbol. And by the way, Dire Moose, I gave pi to a trillion digits. I win. :smallamused:

Trekkin
2011-03-14, 09:20 PM
A relevant work. (http://www.cadaeic.net/cadenza.htm)

And happy pi day, everyone.

Mauve Shirt
2011-03-14, 09:37 PM
The math department gave pie to all of the math majors. I am not a math major, but my roommate made pie for us. :smallbiggrin:

Dogmantra
2011-03-14, 09:42 PM
But pi is not equal to 22/7.

π = 3.141592654...
22/7 = 3.142857143...

The underlined parts are not the same.

However!
a) 3/14 is only pi to two decimal places, and 22/7 is correctly pi to the second decimal place
b) 22/7 has HISTORY m'boy!

Gwyn chan 'r Gwyll
2011-03-14, 11:02 PM
I had pie for dinner. 'Twas a meat pie with turnip mash and cheese on top. 'Twas pretty good.

Doesn't beat the time we took yams and potatoes, and cut them into little squares for Square Root day...

Rotting Baron
2011-03-14, 11:15 PM
Oh cool, pie! I'll have a slice of apple, a slice of pumpk...

Oh, the number. Well, that's cool as well.

MoonCat
2011-03-14, 11:15 PM
I had pie for dinner. 'Twas a meat pie with turnip mash and cheese on top. 'Twas pretty good.

Doesn't beat the time we took yams and potatoes, and cut them into little squares for Square Root day...

Can I come over for dinner?

Science Officer
2011-03-14, 11:22 PM
But pi is not equal to 22/7.

π = 3.141592654...
22/7 = 3.142857143...

The underlined parts are not the same.

Hm, it seems that GiantITP does not like my use of the pi symbol. And by the way, Dire Moose, I gave pi to a trillion digits. I win. :smallamused:

The appeal of Pi Approximation (http://www.qwantz.com/index.php?comic=955) and its day is well explained in that dinosaur comic


Pi day is apparently not for everyone:
http://www.youtube.com/watch?v=jG7vhMMXagQ
(http://www.youtube.com/watch?v=jG7vhMMXagQ)
personally, I don't see how tau and tau/2 is any clearer than pi and 2pi

averagejoe
2011-03-14, 11:29 PM
But pi is not equal to 22/7.

π = 3.141592654...
22/7 = 3.142857143...

The underlined parts are not the same.

Hm, it seems that GiantITP does not like my use of the pi symbol. And by the way, Dire Moose, I gave pi to a trillion digits. I win. :smallamused:

I'm not sure why someone would make an argument against having another day to set aside to eat pie.

Fawkes
2011-03-14, 11:30 PM
Ah, you Americans and your amusing mispronunciation of "pi" :smalltongue:

Still. More accurate graphs would probably not be forum appropriate.

I have never heard anyone, from any country, ever pronounce it differently.


See, I prefer it, because a date that I'd pronounce "The 14th of March" is written 14/03. Nice and simple.

Conversely, a date I'd pronounce "March 14th" is written 3/14. Cuts both ways.


Pi day is apparently not for everyone:
http://www.youtube.com/watch?v=jG7vhMMXagQ
(http://www.youtube.com/watch?v=jG7vhMMXagQ)
personally, I don't see how tau and tau/2 is any clearer than pi and 2pi

I was reading about that on CNN (http://www.cnn.com/2011/TECH/innovation/03/14/pi.tau.math/index.html). Now, I'm not terrible with numbers, but when you get into calculus and trigonometry and irrational numbers my brain goes into sleep mode. Can someone explain to me in layman's terms what the difference is?

Science Officer
2011-03-14, 11:58 PM
I was reading about that on CNN (http://www.cnn.com/2011/TECH/innovation/03/14/pi.tau.math/index.html). Now, I'm not terrible with numbers, but when you get into calculus and trigonometry and irrational numbers my brain goes into sleep mode. Can someone explain to me in layman's terms what the difference is?

pi is pi.
tau would be 2 times pi.
pi is the ratio of the circumference of a circle to its diameter.
tau would be the ratio of the radius of a circle to its diameter.

some say this would make trigonometry easier to understand, for the reasons detailed in the video I linked. you see 2*pi used often enough in math that replacing it with another constant might seem more convenient.

Fawkes
2011-03-15, 12:47 AM
pi is pi.
tau would be 2 times pi.
pi is the ratio of the circumference of a circle to its diameter.
tau would be the ratio of the radius of a circle to its diameter.

some say this would make trigonometry easier to understand, for the reasons detailed in the video I linked. you see 2*pi used often enough in math that replacing it with another constant might seem more convenient.

I watched the video. I understand trigonometry no better.

Eloel
2011-03-15, 12:58 AM
But pi is not equal to 22/7.

π = 3.141592654...
22/7 = 3.142857143...

The underlined parts are not the same.

Hm, it seems that GiantITP does not like my use of the pi symbol. And by the way, Dire Moose, I gave pi to a trillion digits. I win. :smallamused:

3.14 = 3.14000...
π = 3.14159...
22/7 = 3.14285...

22/7 is a closer approximation of pi than 3.14, since
285-159 < 159 - 000

Eldan
2011-03-15, 04:15 AM
I have never heard anyone, from any country, ever pronounce it differently.


In Greek it's pronounced [ˈpi], in English [ˈpaɪ], is what I meant. German follows the Greek pronunciation on this one.

Science Officer
2011-03-15, 11:21 AM
I watched the video. I understand trigonometry no better.

well, would you find it easier to describe a full circle, that is 360 degrees, as 2*pi radians or as tau radians?
is it easier to think of a quarter of a circle as being an angle of pi/2 radians or as being an angle of tau/4 radians?
Which is easier to interpret as being half of a circle, pi or tau/2?

that's really what it boils down to, I think, some people apparently do not like one circle being 2 pi radians.

Ranger Mattos
2011-03-15, 03:30 PM
I'm not sure why someone would make an argument against having another day to set aside to eat pie.

I wasn't I was merely stating that 22/7 is not equal to pi.

Also, apparently my mom stayed up a while last night to make pie.

Maple pear pie. DELICIOUS.

Science Officer
2011-03-15, 03:57 PM
I wasn't I was merely stating that 22/7 is not equal to pi.


Well, that's why it's Pi Approximation Day. A day to eat something that is, approximately, pie.