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odiousgambit
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March 18th, 2018 at 4:27:39 AM permalink
the next time Dame Fortune toys with your heart, your soul and your wallet, raise your glass and praise her thus: “Thanks for nothing, you cold-hearted, evil, damnable, nefarious, low-life, malicious monster from Hell!”   She is, after all, stone deaf. ... Arnold Snyder
teliot
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Wizard
March 14th, 2022 at 11:22:04 AM permalink
In case you need a reminder -- today is 3/14, which is a poor approximation to "pi day."

This is the best approximation of my lifetime, it happened in 2015: 3.141592653



Question -- which date and time in the last 2022 years gave the best approximation to pi?
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rsactuary
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teliot
March 14th, 2022 at 11:34:51 AM permalink
https://scitechdaily.com/how-many-decimals-of-pi-do-we-really-need-nasa-answers/

An interesting answer to how many digits of Pi that NASA uses. If I had to guess, I would have thought more!
ChumpChange
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March 14th, 2022 at 11:45:10 AM permalink
What is the area of a 14 inch pizza?
153.86 square inches
The surface area of a 14-inch pizza is 3.14 x 49 (7 x 7 = 49) = 153.86 square inches of surface area.

So, should I get two 12" mediums for $12.99 each or a 16" large for $18.99?
3.14 x 36 = 113" x 2 = 226 sq"
3.14 x 64 = 201 sq"

It depends if I'm going to eat more than 201 sq".
Dieter
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Joeman
March 14th, 2022 at 11:51:33 AM permalink
Quote: ChumpChange

What is the area of a 14 inch pizza?
153.86 square inches
The surface area of a 14-inch pizza is 3.14 x 49 (7 x 7 = 49) = 153.86 square inches of surface area.

So, should I get two 12" mediums for $12.99 each or a 16" large for $18.99?
3.14 x 36 = 113" x 2 = 226 sq"
3.14 x 64 = 201 sq"

It depends if I'm going to eat more than 201 sq".
link to original post



Is the width of the crust-ring-handle the same in all sizes?
You may wish to recalculate to keep the crust-core-dollar ratios more favorable.
May the cards fall in your favor.
ChumpChange
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March 14th, 2022 at 11:57:55 AM permalink
Nowadays I just get frozen pizza and look at the ounces and try to keep it at 24 or less, but I can't seem to escape the 30 oz boxes.
unJon
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March 14th, 2022 at 12:45:50 PM permalink
Most of the rest of the world celebrates on 22 July.
The race is not always to the swift, nor the battle to the strong; but that is the way to bet.
odiousgambit
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March 14th, 2022 at 1:07:47 PM permalink
Quote: unJon

Most of the rest of the world celebrates on 22 July.
link to original post

I see what you did there!

and that is a closer approximation than 3.14
the next time Dame Fortune toys with your heart, your soul and your wallet, raise your glass and praise her thus: “Thanks for nothing, you cold-hearted, evil, damnable, nefarious, low-life, malicious monster from Hell!”   She is, after all, stone deaf. ... Arnold Snyder
billryan
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March 14th, 2022 at 1:24:18 PM permalink
One of my best friends in high school was born 3-14-60. I was there for many of his birthdays, including his 18th and 21st. I don't think Pi Day was a thing back then.
To all who celebrate- enjoy!
The difference between fiction and reality is that fiction is supposed to make sense.
rsactuary
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March 14th, 2022 at 1:25:34 PM permalink
Quote: unJon

Most of the rest of the world celebrates on 22 July.
link to original post



And that's MY birthday!
Dieter
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March 14th, 2022 at 1:39:41 PM permalink
Quote: unJon

Most of the rest of the world celebrates on 22 July.
link to original post



If you're desperate to throw a party, April 26th is the 116th day of a 365 day year.
May the cards fall in your favor.
mcallister3200
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March 14th, 2022 at 1:39:42 PM permalink
The one day a year folks are expected to grin and bear terrible math jokes.
unJon
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Dieter
March 14th, 2022 at 2:25:32 PM permalink
Quote: Dieter

Quote: unJon

Most of the rest of the world celebrates on 22 July.
link to original post



If you're desperate to throw a party, April 26th is the 116th day of a 365 day year.
link to original post



If only it was the 113th day of a 355 day year . . .
The race is not always to the swift, nor the battle to the strong; but that is the way to bet.
Wizard
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March 14th, 2022 at 2:57:53 PM permalink
Quote: mcallister3200

The one day a year folks are expected to grin and bear terrible math jokes.
link to original post



Why did pi fail its drivers test?
"For with much wisdom comes much sorrow." -- Ecclesiastes 1:18 (NIV)
Ace2
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March 14th, 2022 at 2:59:40 PM permalink
Quote: unJon

Most of the rest of the world celebrates on 22 July.
link to original post

I've always preferred the 19 July and 4 July holidays
It’s all about making that GTA
Dieter
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March 14th, 2022 at 4:00:59 PM permalink
And don't forget there are several other observances, including National Potato Chip day and a personal celebration for some patent clerk.
May the cards fall in your favor.
rxwine
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March 14th, 2022 at 4:46:24 PM permalink
This is National Napping Day.
There's no secret. Just know what you're talking about before you open your mouth.
Dieter
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odiousgambit
March 14th, 2022 at 4:48:20 PM permalink
Quote: rxwine

This is National Napping Day.
link to original post



I think I slept through this afternoon's event.
May the cards fall in your favor.
mcallister3200
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March 14th, 2022 at 4:50:29 PM permalink
Quote: Wizard

Quote: mcallister3200

The one day a year folks are expected to grin and bear terrible math jokes.
link to original post



Why did pi fail its drivers test?
link to original post



I'm not sure. Enlighten me.

But I do know it takes 3.14 bakers to bake a pi. And a mathemetician's favorite animal is a pi-thon. And that 3.14% of sailors are pi-rates. And Isaac Newton's favorite food was pi. And you don't want to get in a conversation with pi at a party because they will go on, and on, and on....
Wizard
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mcallister3200
March 14th, 2022 at 5:15:30 PM permalink
Quote: mcallister3200


I'm not sure. Enlighten me.

But I do know it takes 3.14 bakers to bake a pi. And a mathemetician's favorite animal is a pi-thon. And that 3.14% of sailors are pi-rates. And Isaac Newton's favorite food was pi. And you don't want to get in a conversation with pi at a party because they will go on, and on, and on....
link to original post



Same reason you don't want run into pi at a party, he doesn't know when to stop.
"For with much wisdom comes much sorrow." -- Ecclesiastes 1:18 (NIV)
billryan
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March 14th, 2022 at 5:55:44 PM permalink
Why shouldn't you be intimidated by higher math?

It's as easy as Pi.
The difference between fiction and reality is that fiction is supposed to make sense.
ksdjdj
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March 15th, 2022 at 4:21:47 AM permalink
Quote: Wizard

Quote: mcallister3200

The one day a year folks are expected to grin and bear terrible math jokes.
link to original post



Why did pi fail its drivers test?
link to original post


before I read the answer below was, "because he is always going in circles"


Quote: Wizard

Quote: mcallister3200


I'm not sure. Enlighten me.

But I do know it takes 3.14 bakers to bake a pi. And a mathemetician's favorite animal is a pi-thon. And that 3.14% of sailors are pi-rates. And Isaac Newton's favorite food was pi. And you don't want to get in a conversation with pi at a party because they will go on, and on, and on....
link to original post



Same reason you don't want run into pi at a party, he doesn't know when to stop.
link to original post

DRich
DRich
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March 15th, 2022 at 8:30:01 AM permalink
Quote: ChumpChange

What is the area of a 14 inch pizza?
153.86 square inches
The surface area of a 14-inch pizza is 3.14 x 49 (7 x 7 = 49) = 153.86 square inches of surface area.

So, should I get two 12" mediums for $12.99 each or a 16" large for $18.99?
3.14 x 36 = 113" x 2 = 226 sq"
3.14 x 64 = 201 sq"

It depends if I'm going to eat more than 201 sq".
link to original post



Wouldn't the surface area vary by the thickness of the crust? A 1 inch high crust would have more surface area than a thin crust wouldn't it?
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gordonm888
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teliot
March 15th, 2022 at 4:17:24 PM permalink
So did anything special happen on:

March 14, 1592 at 6:53 and 58.9 seconds?

Also, some people think that the more fundamental number is tau: τ = 2π. Which would put the honor on June 28.
So many better men, a few of them friends, are dead. And a thousand thousand slimy things live on, and so do I.
teliot
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DieterJoemangordonm888
March 16th, 2022 at 5:27:44 AM permalink
Quote: gordonm888

So did anything special happen on:

March 14, 1592 at 6:53 and 58.9 seconds?
link to original post

Shakespeare started writing Richard III.141592653589.... He eventually truncated the play back to simply Richard III after critics claimed the script was irrational.
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Dieter
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March 16th, 2022 at 5:33:15 AM permalink
Quote: gordonm888

So did anything special happen on:

March 14, 1592 at 6:53 and 58.9 seconds?

Also, some people think that the more fundamental number is tau: τ = 2π. Which would put the honor on June 28.
link to original post



I think that almost coincides with a new moon, which is probably something I should base a new calendar system on so I can sell prophecies*.

I think it may be close enough to be a rounding error, given the calculator technology of the time.


Fraction bars with 1 or 2 underneath?

No. It's a lot of work generating spurious prophecies, and I'd probably get demonetized, demonized, and perhaps even demagnetized, depriving me of the healing benefits of elemental copper toe bangles while I sleep.
May the cards fall in your favor.
billryan
billryan
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March 16th, 2022 at 7:16:28 AM permalink
Quote: gordonm888

So did anything special happen on:

March 14, 1592 at 6:53 and 58.9 seconds?

Also, some people think that the more fundamental number is tau: τ = 2π. Which would put the honor on June 28.
link to original post



Julian or Gregorian?
The difference between fiction and reality is that fiction is supposed to make sense.
gordonm888
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gordonm888
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March 16th, 2022 at 9:07:18 AM permalink
Quote: billryan

Quote: gordonm888

So did anything special happen on:

March 14, 1592 at 6:53 and 58.9 seconds?

Also, some people think that the more fundamental number is tau: τ = 2π. Which would put the honor on June 28.
link to original post



Julian or Gregorian?
link to original post



I actually worried about that when I wrote the post; I was just too lazy to research it. There is a legitimate "calendar basis" issue for any pi day, but certainly its more troubling when going back to the 1500s as I did.
So many better men, a few of them friends, are dead. And a thousand thousand slimy things live on, and so do I.
SOOPOO
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March 14th, 2023 at 10:03:10 AM permalink
Our Wizard has limited internet access for a bit but has tasked me with wishing everyone a happy Pi day for him. Done.
Last edited by: SOOPOO on Mar 14, 2023
DRich
DRich
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March 14th, 2023 at 10:56:30 AM permalink
Today is fake Pi day. Euler said pi is the ratio of a circle's radius to its diameter. Therefore Pi day is June 28th
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Joeman
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teliot
March 14th, 2023 at 11:12:41 AM permalink
Quote: DRich

Today is fake Pi day. Euler said pi is the ratio of a circle's radius to its diameter. Therefore Pi day is June 28th
link to original post

I think you may have mixed up your terms. The ratio of a circle's radius to its diameter sounds like Jan. 2 to me!

Besides, I've already had pizza today. Do I need to do it again on June 28? ;)

Also, what about July 22nd for another Pi Day option?
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Dieter
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March 14th, 2023 at 11:47:20 AM permalink
If you want to consider July 22, please also consider the pairing of December 21 and April 23 (December 20/April 22 in leap years).

January 2 is downright hilarious. Thanks.
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TumblingBones
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March 14th, 2023 at 2:28:32 PM permalink
My goal of being well informed conflicts with my goal of remaining sane.
Dieter
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March 14th, 2023 at 4:03:12 PM permalink
The fine gas station I just walked out of is selling large pizzas, cheese or pepperoni, for the expected special today only price, until 8pm (Eastern).

Very festive of them.
May the cards fall in your favor.
DRich
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March 14th, 2023 at 4:22:46 PM permalink
Quote: Joeman

Quote: DRich

Today is fake Pi day. Euler said pi is the ratio of a circle's radius to its diameter. Therefore Pi day is June 28th
link to original post

I think you may have mixed up your terms. The ratio of a circle's radius to its diameter sounds like Jan. 2 to me!

Besides, I've already had pizza today. Do I need to do it again on June 28? ;)

Also, what about July 22nd for another Pi Day option?
link to original post



You are correct. I believe it was Euler that said the circumference is pi*radius. Someone decided to divide Pi in half and change the equation for the circumference to 2*Pi*radius. I will always celebrate it on June 28th as that is my daughters birthday.
At my age, a "Life In Prison" sentence is not much of a deterrent.
gordonm888
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March 14th, 2023 at 4:26:45 PM permalink
Quote: TumblingBones


link to original post



Some of these I have never seen and are pretty amazing!

Does anyone know the proof to

π =(-1) * sqrt (-1) * log (-1) ?

or the proof to:

π = sqrt(6/ Πprimes p (1-1/p2))
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ThatDonGuy
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teliot
March 14th, 2023 at 6:09:09 PM permalink
Quote: gordonm888


Does anyone know the proof to

π =(-1) * sqrt (-1) * log (-1) ?
link to original post



I assume that's ln(-1), which is i * PI, since if x = ln(-1), then -1 = e^x = e^(i PI); -1 * i * (i PI) = PI.
EvenBob
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March 14th, 2023 at 7:16:24 PM permalink
Quote: DRich

I will always celebrate it on June 28th as that is my daughters birthday.
link to original post



June 28th is also the birthday of Elon Musk
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DRich
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March 15th, 2023 at 5:36:46 AM permalink
Quote: EvenBob

Quote: DRich

I will always celebrate it on June 28th as that is my daughters birthday.
link to original post



June 28th is also the birthday of Elon Musk
link to original post



Are you inferring that Elon Musk is my daughter? I will not deny it.
At my age, a "Life In Prison" sentence is not much of a deterrent.
avianrandy
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April 22nd, 2023 at 5:57:01 PM permalink
Ok according to Jeopardy pi is approximated to 3.14, but it's also approximated by this fraction
22/7
odiousgambit
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April 23rd, 2023 at 4:13:43 AM permalink
Quote: avianrandy

Ok according to Jeopardy pi is approximated to 3.14, but it's also approximated by this fraction

22/7

link to original post



that one? let's just say it doesn't need to be in a spoiler cover at this site, but OK I won't show it either

as far as it goes, it is easy to use, something you can sometimes do in your head, and more accurate than 3.14, being off from pi by the shown number of digits by only -0.0012644892681429
the next time Dame Fortune toys with your heart, your soul and your wallet, raise your glass and praise her thus: “Thanks for nothing, you cold-hearted, evil, damnable, nefarious, low-life, malicious monster from Hell!”   She is, after all, stone deaf. ... Arnold Snyder

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