what is the measurement of pi? ;like, in mathmatical terms?
86302
Pi is the ratio of a circle's circumference to its diameter (it's the same for every circle). It's an irrational number, which means that it repeats infinitely, and so far no one has been able to find a pattern in the digits. It's also a transcendental number, which means that it is not possible to construct a polynomial function f with integer coefficients such that f(pi) = 0.\n\nBecause of all that, it's not possible to come up with all the digits of pi, at least not unless someone finds a pattern to them. The world record for most digits of pi calculated is 1,241,100,000,000, which is held by Yasumasa Kanada (or, more accurately, by his computer).\n\nThe formula that Kanada used to calculate pi is large, and kind of cumbersome for anyone but a computer to use. It is, however, very efficient, which is why he used it.\n\nThe simplest formula for calculating pi is to use the arctan series. We know that arctan (pi/4) = 1, by definition of arctan. Using the Taylor Series expansion, we find\n\narctan (t) = t - t^3/3 + t^5/5  - t^7/7 + t^9/9 - ...\n\nThat series does go on forever, but so does pi, and so you can use it to calculate pi/4, by putting in 1 for x:\n\narctan (1) = 1 - 1/3 + 1/5 - 1/7 + 1/9...\n\nThis will give you an approximation of one fourth of pi. With those first five terms, we get about 0.83492 for pi/4, which gives the value of pi as about 3.33968. The real first 6 digits of pi are 3.14159, so you can see that this method needs a lot of terms to be accurate. But it is both conceptually easy and simple to remember.\n\nIf you want to learn more, try http://www.escape.com/~paulg53/math/pi/index.html , which has some other methods for how to calculate pi. The wikipedia article on pi (http://en.wikipedia.org/wiki/Pi ) also has other formulae, including some very modern ones.
410461
PI(π)= 3.14159 26535 89793 23846 26433 83279 50288 41971 69399 37510...\nIt is a Greek letter, and an irrational number. Some formulas it is used in include the formulas for area/perimeter of a circle, surface area of a sphere, and volume of a cylinder. Pi 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.
536388
Pi is the ratio of the diameter to the circumference of the circle.  Circumference = PI x diameter.\n\nThe arabs were the first to use it: they had a very good approximation at 22/7
711674
the circumference of a circle is the diameter * pi.\n\nor...\n\nC = d * 3.14
23358
A=Pi*R^2, where A=area of the circle, R=radius of the circle. * stands for multiplication and ^ for exponent. so the formula for Pi would be Pi=A/R^2.\n\nAnother formula is L=2*Pi*R, where L=length of the circle, R=radius of the circle. so the formula would be Pi=L/2*R.\n\nAnd Pi is an irrational number, meaning that it has an infinity of numbers after the comma. It cannot be exactly calculated, only aproximized. Not even using the ultimate computers, because of a single fact: its memory is not infinite, unlike the number, so you cannot phisically represent it.
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.
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area := Πr2\ncircumference := Πd  ,  r=radius, d=diameter, Π=3.14128....
85817
various formulas for computing pi:\nhttp://mathworld.wolfram.com/PiFormulas.html\nall sorts of fun stuff with pi here:\nhttp://mathworld.wolfram.com/PiDigits.html
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.
665322
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... \n\nThe digits can be up to 4 millions digits (http://www.zenwerx.com/pi.php )
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
375776
In a square: multiply lenght by wittd.\n\nIt all revolves around that\n\nTriangle: base * height /2\n\nCircle: pi ( the matematical value - 3.1416 ) * radius^2\n\nThose are the basic formulae
610173
Radians are based on pi.  A radian is equivalent to 1/(2pi).  Because it is just a ratio of another constant, it isn't based on a physical standard unlike feet, meters, etc.\n\nIt's just like degrees.  A degree is 1/360th of a complete circle, but nobody needs to define 360 with a physical object.  We all know what 360 is.  Similarly we know what 2pi is (it's the circumference of a unit circle).
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try this\nhttp://en.wikipedia.org/wiki/Pi
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Do you mean math concept?\nMarch 14 was Pi day.\nMarch 14 is 3/14.\nPi is approximately 3.14
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if you mean an ellipse....\n\narea is equal to pi * minor radius * major radius
155326
The value of pi is a constant which equals the circumference of a perfect circle divided by its diameter. It is a transcendental number, meaning that the number of decimals is infinite, yet all the numbers are defined. Pi holds a certain mystique to it, as it shows up in all kinds of math equations.\n\nYou may recognize its value as 3.1415926535897932384...\n\nPi was simply the Greek symbol chosen to represent this value.