what exactly is pi? not the whole 3.181 number thing but what actually is it ?
110639
The mathematical constant π is a real number which is defined as the ratio of a circle's circumference (Greek περιφέρεια, periphery) to its diameter in Euclidean geometry, and which is in common use in mathematics, physics, and engineering. The name of the Greek letter π is pi (pronounced pie in English), and this spelling can be used in typographical contexts where the Greek letter is not available. π is also known as Archimedes's constant (not to be confused with Archimedes's number) and Ludolph's number.
550777
So you know, it's pi, not pie. And, by definition, pi is the ratio of a circle's circumference to its diameter. So pi = C/D. Or, C = (pi)D. Or, more commonly, C = 2(pi)r.\n\nArmed with this knowledge, we see that:\n\n1) C = 2(pi)(3) = 18.84\n2) C = (pi)(3) = 9.42\n3) C = 2(pi)(6) = 37.68\n4) C = (pi)(5) = 15.7\n5) C = 2(pi)(10) = 62.8\n\nI hope this helps! =]
617926
3.141592653589793238462643383279502\n884197169399375105820974944.... \n\nI used to know 150.  I just did my senior research paper on pi in hexadecimal looking for patterns and also used an algorithm to find the nth hexadecimal digit without calculating the prior n-1 digits.  Yes, it was a lot of hours.
212215
I presume u mean pi as 22/7\n\ncertain fractions like 22/7 give a near about value\nof pi but only to a few decimal places.For precise work \npi is not taken as 22/7\n\n22/7 = 3.14285714285714...\npi   = 3.14159265358979...\n\nsee the difference!!
438654
Pi, in it's entirety, has never been discovered.  It WOULD technically be posible to number line it, but first you would have to solve it.  and no ... Pi is a deffinit number, it would stay immobile
300967
There is no complete number. Pi just goes on and on and on. The best I could approximation I can give you is 3.14 or 22/7
232073
Pi is what is know as an "irrational" number because it cannot be written as a ratio of two integers.  However, it can be easily defined as the ratio of the circumference of a circle (the distance around the circle) to the diameter of the circle (the circle's width).  This makes it an extremely useful number to "approximate" (since it cannot be expressed fully with a 100% accurate number) when dealing with anything that is cyclical (planetary orbits or repeating patterns for example).  I've included a link with more fun facts.
644332
The website below has an image of the Pi symbol.\n\nHope this helps.
1092540
Pi is the ratio of the circumference of a circle to its diameter. To put it another way, it's the length of the circumference divided by the length of the diameter.\n\nPi always works out to be the same value, no matter what size the circle is. So Pi is a Big Deal because it lets you easily measure the length of the curved line that makes up a circle.\n\nPi = C/D, so if you know the diameter and Pi, you can calculate the circumference.\n\nIF you do the math, and divide the circumference by the diameter, you'll get 3.14159265358979323846264338327950288419716939937510.....\n-- where the dots represent the fact that no matter how long you keep dividing, it never comes out even and the pattern of numbers doesn't repeat. It has reportedly been calculated out to 206 billion digits!!\n\nThere are charts that describe the history of Pi, which goes back to the Babylonians (2000 BC), and how accurately (or inaccurately) Pi has been calculated through the years. I'm sorry I can't make it appear in neat columns here, but you can see it neatly if you go to external link\n\nEven though the rough value of Pi was known long before his time, the first theoretical calculation seems to have been carried out by Archimedes of Syracuse (287-212 BC).
649726
The phrasing of your question is quite wrong, anyway I understand what u expect....\n\nHere is the value of pi upto 100 decimal places\n\n3. 1415926535 8979323846 2643383279 5028841971 6939937510 5820974944 5923078164 0628620899 8628034825 3421170679...\n\n\n\nIf you want the value of pi to more deciaml places, just send a mail to sudharsha_mad@yahoo.co.in\n\nSincerely,\nA Math MAd
298873
You can have as many decimals of Pi as you want. More than a trillion have been calculated up to now.\n\nThere is no pattern apparently in pi decimal expression, but some strange connections with squares and odd numbers appear from these remarkables infinite convergent expressions:\n\nPi =\n3+1/(6+9/(6+25/(6+49/(6+81/ ...\n\nPi/4 = 1-1/3+1/5-1/7+1/9 ...\n\n4/Pi =\n1+1/(3+4/(5+9/(7+16/(9+25/ ...\n\n4/Pi =\n1+1/(2+9/(2+25/(2+49/(2+81/ ...\n\n(Pi^2)/6 =\n1/1+1/4+1/9+1/16+1/25+1/36+ ...\n\n2/Pi =\n(1-1/4)(1-1/16)(1-1/36)(1-1/64)( ...
248100
Bottom line: pi is the ratio between the circumference and the diameter of a circle.\n\nAn infinite sum is one way of approximating pi: just add up lots and lots of the elements in the sum, and you get there eventually.  The infinite sum itself, of course, is pi with utter precision.\n\nThere is a trick (read about it in Science News) where you can compute a specific hexidecimal digit of pi, say the 10948573929384756th digit, without computing any others.  Cute, not useful to me.\n\nThe trick that is used most was developed by Srinvasa Ramanujan, an incredibly brilliant, mostly self-taught mathematician from India.  He developed a recursive formula that converges to pi.  Each iteration roughly doubles the number of decimal digits precision of pi in the answer.  I am given to understand that this is the tool used to do many of the "record breaking length" calculations of pi.  A Google search should dig it up.  I'd dig it up, but I can't find my translation of his notebooks...\n\nYou might want to look up the Buffon's Needle problem in a good book on probability theory...  It is a wonderful, stochastic, computation of the value of pi.  It's also slower than slow to converge...  But FUN to a math freak!
773711
The Greek letter pi is a constant approximately equal to 3.1415. It is irrational, meaning that it has been proven that it's digits continue forever without repeating, and that it cannot be written as a fraction.\n\nThe definition of pi is the ratio of a circle's diameter to it's circumference, but it has the curious property of popping up all over the place in other forms of math too.
481766
By definition, pi is the ratio of the circumference of a circle to its diameter. Pi is always the same number, no matter which circle you use to compute it. \nFor the sake of usefulness people often need to approximate pi. For many purposes you can use 3.14159, which is really pretty good, but if you want a better approximation you can use a computer to get it. Here's pi to many more digits: 3.14159265358979323846.
887559
Pi is the ratio of circumfarence of circle to the diameter. It is irrational and approximated by 22/7\n\nThis can be defined as 4(tan ^-1 1)
236568
Pi is indeterminate.  It keeps going on forever.  Here is the beginning:\n\n3. 14159 26535 89793 23846\n\nThe last link is supposed to list the first 50,000 digits.  I didn't check to see if it was right :).
115785
The value of π has been known in some form since antiquity. As early as the 20th century BC, Babylonian mathematicians were using π=25/8, which is within 0.5% of the exact value.\n\nIt is sometimes claimed that the Bible states that π=3, based on a passage in 1 Kings 7:23 giving measurements for a round basin. Rabbi Nehemiah explained this by the diameter being from outside to outside while the circumference was the inner brim; but it may suffice that the measurements are given in round numbers. (Also, the basin may not have been exactly circular.)