## Poll

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**39 members have voted**

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?

An interesting answer to how many digits of Pi that NASA uses. If I had to guess, I would have thought more!

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".

Quote:ChumpChangeWhat 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".

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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.

I see what you did there!Quote:unJonMost of the rest of the world celebrates on 22 July.

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and that is a closer approximation than 3.14

To all who celebrate- enjoy!

Quote:unJonMost of the rest of the world celebrates on 22 July.

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And that's MY birthday!

Quote:unJonMost of the rest of the world celebrates on 22 July.

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

Quote:DieterQuote:unJonMost of the rest of the world celebrates on 22 July.

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

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If only it was the 113th day of a 355 day year . . .

Quote:mcallister3200The one day a year folks are expected to grin and bear terrible math jokes.

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Why did pi fail its drivers test?

I've always preferred the 19 July and 4 July holidaysQuote:unJonMost of the rest of the world celebrates on 22 July.

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Quote:rxwineThis is National Napping Day.

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I think I slept through this afternoon's event.

Quote:WizardQuote:mcallister3200The one day a year folks are expected to grin and bear terrible math jokes.

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Why did pi fail its drivers test?

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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....

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....

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

It's as easy as Pi.

Quote:WizardQuote:mcallister3200The one day a year folks are expected to grin and bear terrible math jokes.

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Why did pi fail its drivers test?

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Quote:WizardQuote: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....

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

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Quote:ChumpChangeWhat 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".

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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?

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.

Shakespeare started writing Richard III.141592653589.... He eventually truncated the play back to simply Richard III after critics claimed the script was irrational.Quote:gordonm888So did anything special happen on:

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

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Quote:gordonm888So 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.

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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?

Quote:gordonm888So 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.

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Julian or Gregorian?

Quote:billryanQuote:gordonm888So 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.

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Julian or Gregorian?

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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.

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!Quote:DRichToday 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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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?

January 2 is downright hilarious. Thanks.

Very festive of them.

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

Quote:TumblingBones

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/ Π

_{primes p}(1-1/p

^{2}))

Quote:gordonm888

Does anyone know the proof to

π =(-1) * sqrt (-1) * log (-1) ?

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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.

Quote:DRichI will always celebrate it on June 28th as that is my daughters birthday.

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June 28th is also the birthday of Elon Musk

Quote:EvenBobQuote:DRichI will always celebrate it on June 28th as that is my daughters birthday.

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June 28th is also the birthday of Elon Musk

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Are you inferring that Elon Musk is my daughter? I will not deny it.

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

22/7

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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