what is pi out to 25 decimal places?
101056
Try this: \n3.1415926535897932384626433...
573285
Since pi is an irrational, transcendental number, it cannot be "defined" by an integer division.\n\nIts definition is "the circumference of a circle divided by its diameter", conventionally denoted by the (lowercase Greek letter) π.\n\nIt's approximation is 3.14159265, and it is this "approximation" that is commonly represented as 22/7. But this is not the pi (π) itself.
591844
The square root of Pi lies between 1.75 and \n1.78125. We can get finer and finer bounds for \nthe value of the sqaure root of Pi.  After a while we will see that the square root of Pi equals 1.77245....  Since Pi is irrational we can never get an exact answer and we have to settle for an approximation.
271790
Here's the value of pi to 50,000 places:\nhttp://www.ballandclaw.com/upi/pi.50000.html\n\nAnd to 10 places: 3.1415926535
1147102
pi*(r^2)\n\nIt doesn't matter which unit you use, just make sure you're consistent.
458186
The value of π has been known in some form since antiquity. As early as the 19th century BC, Babylonian mathematicians were using π=25/8, which is within 0.5% of the exact value.\n\nThe Egyptian scribe Ahmes wrote the oldest known text to give an approximate value for π, citing a Middle Kingdom papyrus, corresponding to a value of 256 divided by 81 or 3.160.\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 as having a 10 cubit diameter and a 30 cubit circumference. 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.\n\nThe Chinese mathematician Liu Hui computed π to 3.141014 (good to three decimal places) in AD 263 and suggested that 3.14 was a good approximation.\n\nThe Indian mathematician and astronomer Aryabhata in the 5th century gave the approximation π = 62832/20000 = 3.1416, correct when rounded off to four decimal places.\n\nThe Chinese mathematician and astronomer Zu Chongzhi computed π to be between 3.1415926 and 3.1415927 and gave two approximations of π, 355/113 and 22/7, in the 5th century.\n\nThe Indian mathematician and astronomer Madhava of Sangamagrama in the 14th century computed the value of π after tranforming the power series expansion of π/4 into the form\n\nπ = √12(1 - 1/(33) + 1/(532) - 1/(733) + ... \nand using the first 21 terms of this series to compute a rational approximation of π correct to 11 decimal places as 3.14159265359. By adding a remainder term to the original power series of π/4, he was able to compute π to an accuracy of 13 decimal places.\n\nThe Persian Muslim mathematician and astronomer Ghyath ad-din Jamshid Kashani (1350-1439) correctly computed π to 9 digits in the base of 60, which is equivalent to 16 decimal digits as:\n\n2 π = 6.2831853071795865 \nThe German mathematician Ludolph van Ceulen in 1615 computed the first 32 decimal places of π. He was so proud of this accomplishment that he had them inscribed on his tombstone.\n\nIn 1789, the Slovene mathematician Jurij Vega improved John Machin's formula from 1706 and calculated the first 140 decimal places for π of which the first 126 were correct [1] and held the world record for 52 years until 1841, when William Rutherford calculated 208 decimal places of which the first 152 were correct.\n\nThe English amateur mathematician William Shanks, a man of independent means, spent over 20 years calculating π to 707 decimal places (accomplished in 1873). In 1944, D. F. Ferguson found (with the aid of a mechanical desk calculator) that Shanks had made a mistake in the 528th decimal place, and that all succeeding digits were fallacious.
1113206
0, pi/2, pi, 3pi/2, 2pi\n\nall values where 2x = a muliple of pi
401854
not sure--The first one million digits of π and 1/π are available from Project Gutenberg (see external links below). The current record (December 2002) by Yasumasa Kanada of Tokyo University stands at 1,241,100,000,000 digits, which were computed in September 2002 on a 64-node Hitachi supercomputer with 1 terabyte of main memory, which carries out 2 trillion operations per second, nearly twice as many as the computer used for the previous record (206 billion digits). http://en.wikipedia.org/wiki/Pi still not sure-2002 was 4 years ago there maybe a larger number. http://directory.google.com/Top/Science/Math/Recreations/Specific_Numbers/Pi/Digits/
1003152
Too large to print here.\n\nBut you can get the first million decimal places at the following link...
386304
this is exactly the same as a previous question asked about an hour ago. Look back on the open questios, your answer is there\n\nh = 100/pi*r^2\n\nh=7.96
421226
Ha!  I just happen to know pi to 60 decimal places off the top of my head.  \n3.141592653589793238462643383279502884197169399375105820974944
12475
PI doesn't have "didgets"\nIf you're looking for digits, check out http://3.141592653589793238462643383279502884197169399375105820974944592.com/
915477
PI is not spelled like the pie you eat. \n\nThe area of a circle is found by multiplying pi (3.14) by the radius squared. The radius is half of the diameter so it is 3. the radius squared is 9, so multiply that by pi and get 28.26\n\nthe area is 28.26 square meters
914985
= 12.543 (3 decimal places)
1040477
Pi to one MILLION decimal places\n3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679  \n  8214808651328230664709384460955058223172535940812848111745028410270193852110555964462294895493038196  \n  4428810975665933446128475648233786783165271201909145648566923460348610454326648213393607260249141273  \n  724587006606315588174881520920962829254091715364367892590360011330530548820466521384146951941511609...\n\nOkay, wait a minute.\nYou guys are killing my server.\nI could have a million digits of Pi listed here, and it would've really been great. \nSo, I'm going to hide all those nutty digits, and offer you something BETTER.\nLet O be the centre, r be the radius and C be the circumference of a circle.\nThe constant pi, denoted , is a real number defined as the ratio of a circle's circumference  to its diameter , \nIt is also sometimes called Archimedes' constant or Ludolph's constant. Pi's digits have many interesting properties, although not very much is known about their analytic properties. Spigot (Rabinowitz and Wagon 1995; Arndt and Haenel 2001; Borwein and Bailey 2003, pp. 140-141) and digit-extraction algorithms (the BBP formula) are known for pi.\nPi's continued fraction is given by [3, 7, 15, 1, 292, 1, 1, 1, ...] (Sloane's A001203). Its Engel expansion is 1, 1, 1, 8, 8, 17, 19, 300, 1991, 2492, ... (Sloane's A006784). \n\n Pi is known to be irrational (Lambert 1761; Legendre 1794; Hermite 1873; Nagell 1951; Niven 1956; Struik 1969; Königsberger 1990; Schröder 1993; Stevens 1999; Borwein and Bailey 2003, pp. 139-140). In 1794, Legendre  also proved that  is irrational (Wells 1986, p. 76). Pi is also transcendental (Lindemann 1882). An immediate consequence of Lindemann's proof of the transcendence of  pi also proved that the geometric problem of antiquity known as circle squaring is impossible. A simplified, but still difficult, version of Lindemann's proof is given by Klein (1955). \nIt is also known that  pi is not a Liouville number (Mahler 1953), but it is not known if  pi is normal to any base (Stoneham 1970). It is not known if pi+e, pi/e or  natural log of pi are irrational. However, it is known that they cannot satisfy any polynomial equation of degree  less than or equal to 8 with integer coefficients of average size 10 raised to the power 9. Pi crops up in all sorts of unexpected places in mathematics besides circles and spheres. For example, it occurs in the normalization of the normal distribution, in the distribution of primes, in the construction of numbers which are very close to integers (the Ramanujan constant), and in the probability that a pin dropped on a set of parallel lines intersects a line (Buffon's needle problem). Pi also appears as the average ratio of the actual length and the direct distance between source and mouth in a meandering river (Stølum 1996, Singh 1997). \n\nA brief history of notation for pi is given by Castellanos (1988).Pi is sometimes known as Ludolph's constant after Ludolph van Ceulen (1539-1610), a Dutch  calculator. The symbol  was first used by Welsh mathematician William Jones  in 1706, and subsequently adopted by Euler . In Measurement of a Circle, Archimedes  (ca. 225 BC ) obtained the first rigorous approximation by inscribing and circumscribing  6* 2^n-gons on a circle using the Archimedes algorithm. Using  n=4 (a 96-gon), Archimedes  obtained that 3+ 10/71 < pi < 3+ 1/7......(Wells 1986, p. 49; Shanks 1993, p. 140; Borwein et al. 2004, pp. 1-3). \n\nThe Bible contains two references (I Kings 7:23 and Chronicles 4:2) which give a value of 3 for  pi (Wells 1986, p. 48). It should be mentioned, however, that both instances refer to a value obtained from physical measurements and, as such, are probably well within the bounds of experimental uncertainty. I Kings 7:23 states, "Also he made a molten sea of ten cubits from brim to brim, round in compass, and fiv
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 :).
105888
square root(pi) = 1.77245385