@Star2236 I do work in finance, but no, they are just geeks. My son is a rockstar in math, my daughter wants to be She ended up teaching 1st graders, so they didn’t get the shirt at all. They haven’t been introduced to pie/pi yet
@werehatrack They are not doing a very good job of marketing their math then. Also the product needs more features - like a “brain on” switch. I get stats students straight from college algebra (aka watered down 10th and 11th grade math) who appear to have switched their brains off when they walked out of the math class. Finding an on switch that works when they walk into the stats class is torture.
I’m sure I’ve posted it before, but 8yrs ago I made a Square Pumpkin Pie for Pi Day. then promptly fumbled my phone into it when I tried to take a picture…
and just in case you don’t get the joke, Why did I make a Square Pie?
Because PIE ARE SQUARED! DUH!
Fun math exposition (ignore this, if you are mathphobic).
Many people know that 22 / 7 ~= 3.14286 is a reasonable approximation to Pi ~= 3.14159265. It’s good to 2 decimal places, and has an error of about 0.04%.
But few know that with a few more digits in the fraction, an approximation good to six decimal places can be had. 355 / 113 ~= 3.14159292035. This represents an error of about 0.0000086% (about 1/5000 of the previous error).
Fractions with even more digits can be found that improve the approximation (in fact, to as good an accuracy as you like). On the other hand, no fraction can be found that equals Pi EXACTLY, since Pi is an “irrational” number (which by definition, means cannot be represented as a ratio of integers).
You might wonder where these approximating fractions came from. No one knows who first came up with the 22/7, but it was known to the ancient Greek mathematicians such as Euclid or Archimedes, and maybe even before them.
The modern approximations with improved accuracy were not just “stumbled upon”, but can actually be derived through a process. One such is that of “continued fractions”. For anyone curious enough to do a little reading and just a little more thinking, here is a link to a .pdf file that is one of the most accessible discussions I’ve seen on the topic.
Be sure to have paper and pencil handy when you read that article! Most people do not absorb new math topics immediately without doing some hands-on work.
@phendrick BTW, I’d be happy to answer questions over this idea, including those induced by the link I gave. (I’m assuming I’ll not be overwhelmed by people who want to learn some math, as a side hobby.) I might be a day or two in replying.
Note that there are numerous resources on the web over this topic, including YouTube videos. There are even whole books.
Disclaimer: I don’t claim to be an expert in this material at the PhD level!
[Try to not leave “spoilers” for those wanting to work the sample exercises. Just “whisper” to me about those.]
Pay special attention to “convergents”. That is where the increasingly accurate approximations to Pi can be found, for instance.
@incarocaeli I bought a pie (pizza) from Uno’s for $3.14, and McDonald’s gave me one when I made a minimum purchase of $1. Since they had two cookies for a $1, that worked out well for me!
A piece of my write my essay about the number Pi.
Pi is the ratio of the length of a circle to its diameter. It is impossible to represent the number pi as an ordinary decimal: the fraction is infinite, and there is no regularity in the distribution of digits after the decimal point. With a mysterious constancy it pops up in the most unexpected places. For example, the ratio of bank length to the distance between the source and the mouth is about… That’s right, 3.14.
In September 2010, Nicholas Zhe of the technology company Yahoo was able to determine 2 000 000 000 000 000 digits of Pi after the decimal point - two quadrillion digits. If this work had been done on a single computer, it would have taken 500-plus years. But Zhe used so-called cloud computing technology called Hadoop - a cloud of a thousand computers at a time was involved. And even so, it took 23 days to do the calculations.
√-1 2^3 Σ π
@mike808 my son is wearing a shirt to school today with that on it…
and my daughter is wearing this:
@mike808 @mikibell
Do you do something with numbers to send you kids off to school in those lol
@Star2236 I do work in finance, but no, they are just geeks. My son is a rockstar in math, my daughter wants to be
She ended up teaching 1st graders, so they didn’t get the shirt at all. They haven’t been introduced to pie/pi yet 
gimme a slice
/giphy pi slice
I want some pie!
/giphy homer pie
What are the best pie day deals
A list of deals:
https://slickdeals.net/f/15668815-pi-day-3-14-deals-hall-of-fame-shame-edition-3-14
@bdb Why is that not post “31415926536-pi-day-3-14-deals-hall-of-fame-shame-edition-3-14”?
Pi day is just a fake holiday created by math companies to sell more math.
@werehatrack They are not doing a very good job of marketing their math then. Also the product needs more features - like a “brain on” switch. I get stats students straight from college algebra (aka watered down 10th and 11th grade math) who appear to have switched their brains off when they walked out of the math class. Finding an on switch that works when they walk into the stats class is torture.
@lonocat If you’re only going to four decimal places then it should be 3.1416.
My dad said the proper shape for a piece of pie was circular.
@blaineg completely agree
@blaineg Nope. Pie are squared.
@blaineg @gt0163c sounds like a battle
I’m sure I’ve posted it before, but 8yrs ago I made a Square Pumpkin Pie for Pi Day. then promptly fumbled my phone into it when I tried to take a picture…
and just in case you don’t get the joke, Why did I make a Square Pie?
Because PIE ARE SQUARED! DUH!
@earlyre Looks tasty
Fun math exposition (ignore this, if you are mathphobic).
Many people know that 22 / 7 ~= 3.14286 is a reasonable approximation to Pi ~= 3.14159265. It’s good to 2 decimal places, and has an error of about 0.04%.
But few know that with a few more digits in the fraction, an approximation good to six decimal places can be had. 355 / 113 ~= 3.14159292035. This represents an error of about 0.0000086% (about 1/5000 of the previous error).
Fractions with even more digits can be found that improve the approximation (in fact, to as good an accuracy as you like). On the other hand, no fraction can be found that equals Pi EXACTLY, since Pi is an “irrational” number (which by definition, means cannot be represented as a ratio of integers).
You might wonder where these approximating fractions came from. No one knows who first came up with the 22/7, but it was known to the ancient Greek mathematicians such as Euclid or Archimedes, and maybe even before them.
The modern approximations with improved accuracy were not just “stumbled upon”, but can actually be derived through a process. One such is that of “continued fractions”. For anyone curious enough to do a little reading and just a little more thinking, here is a link to a .pdf file that is one of the most accessible discussions I’ve seen on the topic.
Be sure to have paper and pencil handy when you read that article! Most people do not absorb new math topics immediately without doing some hands-on work.
@phendrick BTW, I’d be happy to answer questions over this idea, including those induced by the link I gave. (I’m assuming I’ll not be overwhelmed by people who want to learn some math, as a side hobby.) I might be a day or two in replying.
Note that there are numerous resources on the web over this topic, including YouTube videos. There are even whole books.
Disclaimer: I don’t claim to be an expert in this material at the PhD level!
[Try to not leave “spoilers” for those wanting to work the sample exercises. Just “whisper” to me about those.]
Pay special attention to “convergents”. That is where the increasingly accurate approximations to Pi can be found, for instance.
@phendrick
means that reason alone isn’t going to find an answer to that division problem. There. Fixed it for you.
@Kidsandliz
/giphy bill nye get outta here
@Kidsandliz In my first line,
@phendrick Oh I just had to pun you. I’m not math phobic, although given a choice I wouldn’t teach business stats to those who are.
What other type of pies did you get?
@incarocaeli
None, in my specific case. I’d have had to buy or make one.
@incarocaeli I bought a pie (pizza) from Uno’s for $3.14, and McDonald’s gave me one when I made a minimum purchase of $1. Since they had two cookies for a $1, that worked out well for me!
@bdb @incarocaeli If the radius of that pie is z, its area can be found using the formula
pi * z * z = a
@werehatrack
@macromeh I just got it.
Oh my goodness…you guys. That’s not the only pie around. There are other pies we like. By we, I mean women.
From an old woot sale… One I gave to my geek son
It’s called reflections on pi…
@chienfou One of favorite shirts of all time is a long sleeve woot shirt with a beautifully laid out 3.14159
@chienfou I can’t find it in their catalog.
https://shirt.woot.com/plus/pi-day-shirts-1
This one is very nice, but not my true love:
https://shirt.woot.com/offers/beautiful-pi
@bdb Is it Zu Chongzhi’s estimate?
https://shirt.woot.com/offers/zu-chongzhis-estimate
@narfcake It was, it was! How did you find it?
@bdb Wild guess, actually, though I do have one an original run of it.
@narfcake I wish it was available long sleeve and/or on a good quality blank.
A piece of my write my essay about the number Pi.
Pi is the ratio of the length of a circle to its diameter. It is impossible to represent the number pi as an ordinary decimal: the fraction is infinite, and there is no regularity in the distribution of digits after the decimal point. With a mysterious constancy it pops up in the most unexpected places. For example, the ratio of bank length to the distance between the source and the mouth is about… That’s right, 3.14.
In September 2010, Nicholas Zhe of the technology company Yahoo was able to determine 2 000 000 000 000 000 digits of Pi after the decimal point - two quadrillion digits. If this work had been done on a single computer, it would have taken 500-plus years. But Zhe used so-called cloud computing technology called Hadoop - a cloud of a thousand computers at a time was involved. And even so, it took 23 days to do the calculations.
@liahughes @Ignorant @narfcake
Spammish?
@Kyeh @narfcake I’m sure spam is coming but nothing yet.
@Ignorant @narfcake
so all the zeros are not a spam link?
@Ignorant @Kyeh Nope, not a link.
@Ignorant @narfcake Oh, I guess my phone thinks it’s a phone numer!