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What Is Your Favorite Pi Math Question? [Vanity]
FreeRepublic ^ | March 14, 2019 | Reno89519

Posted on 03/14/2019 2:04:52 PM PDT by Reno89519

Yes, today is Pi Day! What is your favorite Pi math question?


TOPICS: Education; Miscellaneous; Science; Weird Stuff
KEYWORDS: circle; circumference; diameter; math; pi; piday; radius
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To: mountainlion

One would suspect it was the use of a wheel to measure distance.


61 posted on 03/14/2019 4:17:27 PM PDT by Aevery_Freeman (Death to RINO's!)
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To: BadLands59

If Pi is infinite, may I have another?


62 posted on 03/14/2019 4:25:47 PM PDT by depressed in 06 (60 in '20.)
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To: sparklite2

My brother and I used to challenge each other memorizing pi. I could only get up to 4626.

It got useful in later years when I had to come up with new passwords every 3 months on the work computers.


63 posted on 03/14/2019 4:26:56 PM PDT by RandallFlagg (Fact: Gun control laws kill innocents.)
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To: RandallFlagg

I wouldn’t mind coming up with new passwords
if I could remember them five minutes later.


64 posted on 03/14/2019 4:32:39 PM PDT by sparklite2 (Don't mind me. I'm just a contrarian.)
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To: CaptainK

Because Pi claims to measure a “circle”, a thing that does not actually exist. What exists is a series of connected triangles.


65 posted on 03/14/2019 4:38:48 PM PDT by myerson
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To: DUMBGRUNT

that’s a good one! It’s pretty obvious once you figure it out. I approached it from the way of, what extra length would I need to raise the string 1 m off the ground.


66 posted on 03/14/2019 4:45:52 PM PDT by posterchild
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To: yarddog

back in the 80s I paid $200 (real money back then) for a 41CV (or was it a CX?) for solving simultaneous equations in circuits class. Is the Inspire RPN also?


67 posted on 03/14/2019 4:47:25 PM PDT by posterchild
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To: mountainlion

Because they measured the space for the pyramids with a wheel on a stick, and a mark to count the revolutions.


68 posted on 03/14/2019 4:52:56 PM PDT by motor_racer (If you don't read the news, you are uninformed. If you read the news, you are misinformed.)
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To: yarddog

Divisibility for 3,9 and 6.
The sum of the digits works for 3 and 9 and if even 6.

And do not even look at the rule of 72.
Not on Pi day.


69 posted on 03/14/2019 5:04:36 PM PDT by DUMBGRUNT ("The enemy has overrun us. We are blowing up everything. Vive la France!")
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To: LucyT

“Because Pi is an irrational number. “

You obviously think binary! Pi is NOT irrational. Just misunderstood.


70 posted on 03/14/2019 5:10:02 PM PDT by Mr Rogers (Professing themselves to be wise, they became fools)
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To: posterchild

I don’t think it is but I can’t figure it out. Back in the 60s I was pretty good at math. Always scored in the 99th percentile on math. Also in college. Now I can’t even figure out how to use a complex calculator. Will probably just give it to my Grandson tho he is not that good at math.

Back in 1973 I bought a calculator for I think $67. It was made by Rockwell but was branded Sears. I came across it a year or so ago and guess what? It still works. It has a beautiful light green display which is easy on the eyes.

Around 1990 a store cleared out a bunch of HP calculators for $10 each. I bought every one of them just to play with. They all use RPN and for some reason they began to be highly desired around 2000. I sold them all on ebay for between $60 and $100 each. I recall one was purchased by a Scottish Engineering student.


71 posted on 03/14/2019 5:10:04 PM PDT by yarddog
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To: Reno89519

Seen on a t-shirt:

Pi: Irrational but well rounded.


72 posted on 03/14/2019 5:15:37 PM PDT by admiral52 (The Admiral)
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To: lee martell

“What is it used for in today’s world”

It’s how you figure the circumference or area of a circle given its diameter.


73 posted on 03/14/2019 5:39:37 PM PDT by cymbeline
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To: Reno89519

Pi r O


74 posted on 03/14/2019 6:19:54 PM PDT by richardtavor
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To: ETL

Causing seizures?


75 posted on 03/14/2019 6:22:39 PM PDT by richardtavor
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To: posterchild; DUMBGRUNT

If you raised it 1M, the ends of the string would be 2M apart. The formula is pi times the diameter. The diameter is twice the radius.

I learned back when we didn’t use meters. If the world was a perfect circle and you rapped a string around it and cut it where the ends meet. If you raised it 6” all the way around, how far apart would the ends be. The ends would be 3.14’ apart. Six inch to the radius is one foot to the diameter. One more times pi BVB


76 posted on 03/14/2019 7:09:49 PM PDT by Bobsvainbabblings
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To: Robert A Cook PE

the “really important” one was 3/14 /15 at 9:26:53 am.


77 posted on 03/15/2019 12:15:03 AM PDT by SunkenCiv (this tagline space is now available)
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To: Ezekiel
I'm trying to visualize your post


78 posted on 03/15/2019 2:50:19 AM PDT by Daffynition (Rudy: What are you up to today? :))
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To: SunkenCiv

You remembered!


79 posted on 03/15/2019 5:34:57 AM PDT by Robert A Cook PE (The democrats' national goal: One world social-communism under one world religion: Atheistic Islam.)
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To: posterchild; yarddog; SunkenCiv; Ernest_at_the_Beach; Kaslin
back in the 80s I paid $200 (real money back then) for a 41CV (or was it a CX?) for solving simultaneous equations in circuits class. Is the Inspire RPN also?

As a senior physics II student in high school in 1974, my physics prof came in with the FIRST digital calculator available in any San Antonio high school. Maybe the firsdt in the city as well.

In fall 1976, after two years of using a slide rule for engineering classes, I scraped up 435.00 dollars (in pre-Carter inflationary dollars!) for an HP45 to use as a junior and senior. RPN.

80 posted on 03/15/2019 5:41:28 AM PDT by Robert A Cook PE (The democrats' national goal: One world social-communism under one world religion: Atheistic Islam.)
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