How many decimal points does PI actually have?
409382
Actually, by the wording of your question, the answer is 1. Any number has exactly one decimal point in it. 3.14 ... the decimal point is between the 3 and the 1
373563
I did a google search and found pi to a million digits! I'm not playing around - go to the site below and compare every number! Or you may count each number to make sure it is actually one million digits. (lol)\n\n3.1415926535 8979323846 2643383279 5028841971 6939937510\n  5820974944 5923078164 0628620899 8628034825 3421170679\n  8214808651 3282306647 0938446095 5058223172 5359408128\n  4811174502 8410270193 8521105559 6446229489 5493038196\n  4428810975 6659334461 2847564823 3786783165 2712019091\n  4564856692 3460348610 4543266482 1339360726 0249141273\n  7245870066 0631558817 4881520920 9628292540 9171536436\n  7892590360 0113305305 4882046652 1384146951 9415116094\n  3305727036 5759591953 0921861173 8193261179 3105118548\n  0744623799 6274956735 1885752724 8912279381 8301194912\n\n  9833673362 4406566430 8602139494 6395224737 1907021798\n  6094370277 0539217176 2931767523 8467481846 7669405132\n  0005681271 4526356082 7785771342 7577896091 7363717872\n  1468440901 2249534301 4654958537 1050792279 6892589235\n  4201995611 2129021960 8640344181 5981362977 4771309960\n  5187072113 4999999837 2978049951 0597317328 1609631859\n  5024459455 3469083026 4252230825 3344685035 2619311881\n  7101000313 7838752886 5875332083 8142061717 7669147303\n  5982534904 2875546873 1159562863 8823537875 9375195778\n  1857780532 1712268066 1300192787 6611195909 2164201989\n\n  3809525720 1065485863 2788659361 5338182796 8230301952\n  0353018529 6899577362 2599413891 2497217752 8347913151\n  5574857242 4541506959 5082953311 6861727855 8890750983\n  8175463746 4939319255 0604009277 0167113900 9848824012\n  8583616035 6370766010 4710181942 9555961989 4676783744\n  9448255379 7747268471 0404753464 6208046684 2590694912\n  9331367702 8989152104 7521620569 6602405803 8150193511\n  2533824300 3558764024 7496473263 9141992726 0426992279\n  6782354781 6360093417 2164121992 4586315030 2861829745\n  5570674983 8505494588 5869269956 9092721079 7509302955\n\n  3211653449 8720275596 0236480665 4991198818 3479775356\n  6369807426 5425278625 5181841757 4672890977 7727938000\n  8164706001 6145249192 1732172147 7235014144 1973568548\n  1613611573 5255213347 5741849468 4385233239 0739414333\n  4547762416 8625189835 6948556209 9219222184 2725502542\n  5688767179 0494601653 4668049886 2723279178 6085784383\n  8279679766 8145410095 3883786360 9506800642 2512520511\n  7392984896 0841284886 2694560424 1965285022 2106611863\n  0674427862 2039194945 0471237137 8696095636 4371917287\n  4677646575 7396241389 0865832645 9958133904 7802759009\n\n  9465764078 9512694683 9835259570 9825822620 5224894077\n  2671947826 8482601476 9909026401 3639443745 5305068203\n  4962524517 4939965143 1429809190 6592509372 2169646151\n  5709858387 4105978859 5977297549 8930161753 9284681382\n  6868386894 2774155991 8559252459 5395943104 9972524680\n  8459872736 4469584865 3836736222 6260991246 0805124388\n  4390451244 1365497627 8079771569 1435997700 1296160894\n  4169486855 5848406353 4220722258 2848864815 8456028506\n  0168427394 5226746767 8895252138 5225499546 6672782398\n  6456596116 3548862305 7745649803 5593634568 1743241125\n\n  1507606947 9451096596 0940252288 7971089314 5669136867\n  2287489405 6010150330 8617928680 9208747609 1782493858\n  9009714909 6759852613 6554978189 3129784821 6829989487\n  2265880485 7564014270 4775551323 7964145152 3746234364\n  5428584447 9526586782 1051141354 7357395231 1342716610\n  2135969536 2314429524 8493718711 0145765403 5902799344\n  0374200731 0578539062 1983874478 0847848968 3321445713\n  8687519435 0643021845 3191048481 0053706146 8067491927\n  8191197939 9520614196 6342875444 0643745123 7181921799\n  9839101591 9561814675 1426912397 4894090718 6494231961\n\n  5679452080 9514655022 5231603881 9301420937 6213785595\n  6638937787 0830390697 9207734672 2182562599 6615014215\n  0306803844 7734549202 6054146659 2520149744 2850732518\n  6660021324 3408819071 0486331734 6496514539 0579626856\n  1005508106 6587969981 6357473638 4052571459 1028970641\n
96413
Actually, there are rather sophistocated ways of proving that pi is irrational, which means that it can never be written completely in decimal form. I have seen a proof before, but the concepts were too difficult for me to grasp. Therefore, we ARE SURE that pi can never be fully expressed as a decimal expansion, i.e. it will go on forever with no repeating pattern.\n\nHere is just one web example for the proof. \n\nhttp://www.lrz-muenchen.de/~hr/numb/pi-irr.html
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)
967610
First off, 22/7 is an approximation of pi. Pi is an irrational number that  cannot be written as finite fraction or decimal. Pi is equal to the ratio of the circumference of a circle to its diameter. The initial decimalization of pi is 3.14159... it goes on forever, never with a repeating pattern. 22/7 = 3.14285714285714 which is somewhat close to pi but not the same thing at all.
1006205
pi is infinite, calculated out to at least a billion digits right now, and it has no iterations (meaning repeated numbers)...so there would be no final digits....
267368
Pi is defined as a circle's circumference divided by its diameter. No matter what the radius of the circle is, when you divide those quantities, you'll get pi. \n\nHere's the weird thing: pi is more than just an irrational number. It's also a *transcendental* number, so "it \ncannot be the root of an algebraic equation with a finite number of terms." Quoted from the link below.
701341
What is the "truncated" value of Pi to 9 decimal places?\n\n\n**sidenote - since Pi's tenth and eleventh decimal place digits are 5 and 8,  Pi to 9 decimal places would tend to round up as 3.141592654 instead. However requesting the truncated value just cuts it off at the end of 9 decimal places no matter the following digit values.
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/
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)( ...
83174
There's no particular reason to say that a circle has 360 degrees. It can also be said that a circle has 6400 mils, 8 octants. The important thing is to ensure that whatever names and/or values  you assign to a circle, it's consistent with other related measurements, like pi.
461233
In Euclidean plane geometry, π may be defined either as the ratio of a circle's circumference to its diameter, or as the ratio of a circle's area to the area of a square whose side is the radius. Advanced textbooks define π analytically using trigonometric functions, for example as the smallest positive x for which sin(x) = 0, or as twice the smallest positive x for which cos(x) = 0.\n\nAll these definitions are equivalent, they amount to the following numerical value of π, truncated to 50 decimal places:\n\n3.14159265358979323846264338327950288419716939937510
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.
442480
How can there be a square root of pi if pie is round?  Sounds better when spoken not read.
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.
168968
According to Pi World Ranking List the current verified world record holder for reciting the most digits of Pi is Hiroyuki Goto who achieved 42,195 digits in 1995.  However, there is an as-yet-unverified claim that Akira Haraguchi recited 83,431 decimal places in 2005.\n\nMost impressive, indeed.\n\nI hope you found that helpful!
325893
PI= π = 22/7 = 3.1428571428571428571428571428571\n\nIn Euclidean plane geometry, π may be defined either as the ratio of a circle's circumference to its diameter, or as the ratio of a circle's area to the area of a square whose side is the radius. Advanced textbooks define π analytically using trigonometric functions, for example as the smallest positive x for which sin(x) = 0, or as twice the smallest positive x for which cos(x) = 0.\n\nAll these definitions are equivalent, they amount to the following numerical value of π, truncated to 50 decimal places:\n\n3.14159 26535 89793 23846 26433 83279 50288 41971 69399 37510