does anyone know what pie is by heart?

Answer 1

Pie has no ending. It's an irrational number, so it would be pointless to memorize everything beyond 3.14. So, you can't tell, I don't have it memorized beyond that point. :) Why, how far can you go?

Answer 2

I have known a guy who did 10000 decimals or so... kind of funny, when he saw a phone number he could say: "hey, that is part of pi".

Anyway, knowing even that many decimals doesn't mean you know pi. It is still not precise.

Knowing what pi is means knowing its definition. Here goes (original geometrical definitions):

--> pi is the ratio between circumference and diameter of circle
--> pi is the ratio between area of circle and square on its radius
--> pi is the ratio between area of sphere and square on its diameter

Mathematically, we can even go further:

--> pi = 4 . (1 - 1/3 + 1/5 - 1/7 + 1/9 - 1/11 + 1/13 - + ... )

Or:

--> pi = 3 divided by the probability that if you throw a 1 inch pin on a 1 inch square grid paper, the pin will cross a line of the grid

Or:

--> pi = the square root of six times the sum of the reciprocal squares of natural numbers, that is,

--> pi = sqrt{6 . [1/1 + 1/4 + 1/9 + 1/16 + 1/25 + 1/36 + 1/49 + ...]}

Answer 3

anyone who can divide 22 by 7 very quickly knows pie by heart... also note that the number is infinite and will not stop at 1, 2, or 100 dec places

Answer 4

Ya tons of people know pie out to quite a few digits but no one knows the whole thing. I saw a guy on TV who must see some sort of pattern in pie or something because he can recite it to hundreds of digits.
Yummmm pi

Answer 5

The furthest I ever bothered to memorize the sequence was:

3.14159265 35897932 38462433 83279502 8841971

...and that was just to impress my other geeky friends way back in junior high. I'm kinda surprised that I still know it to this day.

Unless you really did mean "pie", even though you posted in a mathematics forum. In which case, it is: A dessert consisting of a filling (as of fruit or custard) in a pastry shell and/or topped with pastry.

Answer 6

No you can come only to an approximation. It's a number which doesn't even seem recurring. It's nearly 3.14 or 22/7 as used for school calculations. Nobody not even the fastest and most powerful computer can't answer your question as it's impossible

Answer 7

Hi:

Yes and no. I know it : 3.141592658 and no the exact value of it I don't know However if use the following formula : you can calulate Pi to any number of decimal place you want to go to:

pi = Sin ( (360/n)/2)*n { n= the number of triangles ( try any number between 10000 to infinity for good results)}

Tan ( (360/n)/2)* n = pi { n= the number of triangles ( try any number between 10000 to infinity for good results)}

and look up pi in yahoo answers search engine and check out iroc70 answers for it

Answer 8

22/7

Answer 9

i know it to 10 sig fig by heart. I was really bored once in school and was playing with the pi button on my calculator. i ended up memorising it to 10 sig fig. Now i cant get it outta my head.

3.141592654

Answer 10

I find it easier to recall strings of numbers in Chinese, it sort of flows like a poem, with 7 syllables in each line (trochaic heptameter).

3.14159
2653589
7932384
6264338

that's all i memorized.