# Pi DayWatch

10 years ago
#21
Pi day is my birthday . Its the 22nd July because its 22/7 which is the diophantine approximation of Pi.
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10 years ago
#22
Happy Pi day everyone
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10 years ago
#23
(Original post by Mush)
True true. But ... nah... :P

If the point of making pi = 6.28 is to get rid of that random constant, 2. Then surely it wouldn't make sense to consider it as a ratio to the diameter instead of the radius, to get rid of that constant! Even then, if pi was 6.28. Then it would be "the ratio of a circle's circumference to it's radius...... divided by 2...." not multiplied.
2pi=6.28.... is the ratio of a circle's circumference to its radius.

I never really thought about that. I find it annoying that pi/2 isn't half a circle etc but never realised just how often that pesky 2 creeps in.
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10 years ago
#24
(Original post by Mush)
Ach, *******s! The definition of is the ratio of a circles circumference to it's diameter!

If then you'd have to say "Pi is the ratio of a circle's curcumference to it's diamter.... *COUGH* ... multiplied by two for no real reason(said quickly and in hushed tones!).

It just wouldn't make sense!
I think you are missing the point. It is the relationship to the radius, not the diameter which is more important. So just say ...the ratio of a circle's circumference to its radius... of course, adding in the factor two.

I don't think that anyone wants to change pi now (even the author of that article) but it is worth stating that is much more fundamental.
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10 years ago
#25
Like h/...2pi
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10 years ago
#26
We had a competition to see how many digits of pi the third form (Year 7s) could memorise. The winner got up to 124 and the second place was someone with 105. They had a week to learn it.
I help with the Junior Maths Club and they (along with people from years 8-13, which was funny) made pi jewellery - beaded bracelets with 3 red beads, 1 white bead (the decimal point), 4 blue beads, 1 green bead etc...
There was also a competition for the best pi mnemonic.
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10 years ago
#27
(Original post by stordoff)
e Day, surely?

Edit: e=2.7, Still don't unstand why 22nd July is Pi Day
the approximation - pi approx = 22/7
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10 years ago
#28
Did the BBC article annoy anyone else?

Every second sentence was factually wrong.
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10 years ago
#29
Pi is exactly three ;yes;
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10 years ago
#30
(Original post by generalebriety)
Did the BBC article annoy anyone else?

Every second sentence was factually wrong.
This?
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10 years ago
#31
I've memorised pi to 80 decimal places, thus further reinforcing the Asian stereotype.
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10 years ago
#32
I can only do it to 3.14159265359
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10 years ago
#33
(Original post by Ethelred the Unready)
This?
That's the one.
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10 years ago
#34
(Original post by generalebriety)
Did the BBC article annoy anyone else?
I particularly liked:

"While there are many infinitely long numbers in maths, pi is the only one in which an infinitely simple idea - the circle - unfolds into an infinitely complex value. This paradox drives many people to distraction."

"In fact, it's literally impossible to know what pi is, because its digits rattle off into infinity."

""However, if you ask a typical maths nerd, you'll get an earful of pi - 3.14159265 and so on."
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10 years ago
#35
e stems from a very simple idea, too. And of course we know what pi is and how to calculate it. Crap article.

I still want an i day
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10 years ago
#36
(Original post by Lusus Naturae)
I particularly liked:

"While there are many infinitely long numbers in maths, pi is the only one in which an infinitely simple idea - the circle - unfolds into an infinitely complex value. This paradox drives many people to distraction."

"In fact, it's literally impossible to know what pi is, because its digits rattle off into infinity."

""However, if you ask a typical maths nerd, you'll get an earful of pi - 3.14159265 and so on."
Of the people I've spoken to, mathematicians and otherwise, this phrase seems to be a favourite for the "bull****" category.
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10 years ago
#37
(Original post by ukebert)
I can only do it to 3.14159265359
Well, you can improve on that easily since 3.14159265358979 has a nice pattern to it. The next four aren't so nice - I forget them after a while... in fact, I just learnt them on Tuesday but I've forgotten already.
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10 years ago
#38
(Original post by tommmmmmmmmm)
e stems from a very simple idea, too. And of course we know what pi is and how to calculate it. Crap article.
That was the sentence that made me go :wtf?:

(Original post by Zhen Lin)
Well, you can improve on that easily since 3.14159265358979 has a nice pattern to it. The next four aren't so nice - I forget them after a while... in fact, I just learnt them on Tuesday but I've forgotten already.
I shall endevour to remember
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10 years ago
#39
I've got it down to

3.1415926535 8979323846 2643383279 5028841971 6939937510 5820974944 5923078164
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10 years ago
#40
tbh, its bad if you've memorised pi to more decimal places than your calculator shows, it means you've actually put effort into it
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