Where is Pi used in mathematics?
348635
Since Pi is the ratio of a circle's circumference to its diameter, it occurs wherever periodic or trigonometric structures are studied, as well as spherical structures which occur such as contour integration, measure theory (analysis, probability and statistics), and differential geometry. It is thus also a natural way of measuring angles.
256272
Recently, the highest digit of PI was calculated.  You should probably do a google search for the articles.  If you need to do slides on this, you could probably start out by discussing what Pi is, then who came up with the equation for Pi, then continue discussing what the highest digit of Pi is.  Also, there is an annual contest held where people try to recite the digits of Pi.  Recently, a high school student placed like 8th in the world.\n\nHere is a link to the high school student who recited the digits:\n\nhttp://www.msnbc.msn.com/id/11858760/
776144
Pi is irrational number. Super computers are used to calcluate Pi upto more and more digits. You can find more details in
275576
pi is the circumference of a circle divided by its diameter.  It has been estimated over the years by many mathmeticians but now we have got it down to a lot of decimal places.  try http://en.wikipedia.org/wiki/Pi
78720
Pi is a name given to the ratio of the circumference of a circle to the diameter. That means, for any circle, you can divide the circumference (the distance around the circle) by the diameter and always get exactly the same number. It doesn't matter how big or small the circle is, Pi remains the same. Pi is often written using the symbol  and is pronounced "pie", just like the dessert.
473889
Since ancient history regarding the concept.\n\nHistory of the notation:\n\nThe symbol "π" for Archimedes' constant was first introduced in 1706 by William Jones when he published A New Introduction to Mathematics, although the same symbol had been used earlier to indicate the circumference of a circle. The notation became standard after it was adopted by Leonhard Euler. In either case, 'π' is the first letter of περιφέρεια (periphereia, the Greek word for periphery) or περίμετρον (perimetron), meaning 'measure around' in Greek.
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.
1122475
The value of Pi has been known for thousands of years, as early as the 19th century BC with Babylonian mathematicians, who were only 0.5% off the true value of pie. Over the centuries, the number became perfected and more accurate my mathematicians of all regions, from China, to Egypt, to India. The German mathematician Ludolph van Ceulen computed the first 32 decimal places of pi. In 1947, William Shanks calculated pi to 808 decimal places, only with the help of a mechanical desk calculator.\n\nHope this helps!
482434
Pi is never mentioned in the Bible; it is implied!   We (and let me repeat, we) deduce that pi is the 30 cubits around by 10 cubits brim to brim simplifies to just 3.    \n\nThe translations of the Bible over the span of mankind have changed the wordings and even the meanings of some verses.\nSince the original author(s) of Kings was inspired by God they would have spent their minds on faith and poetic emotion rather than intense technical information such as describing decimals.  The information for someone building or doing basic construction can and easily get by with just an approximate value of 3
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
1147102
pi*(r^2)\n\nIt doesn't matter which unit you use, just make sure you're consistent.
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
482997
because the definition of pi is the ratio of a circle's circumference to its diameter, or \n\npi = circumfrance:diameter\n\nthis ratio always equals 3.14.... , it's a constant
932970
try this\nhttp://en.wikipedia.org/wiki/Pi
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 )
670968
The ratio of a circle's circumference to its diameter was only given the name pi in the last 300 years or so. The fact that it is a letter of the Greek alphabet should not mislead you into thinking that the Greeks were the first to use the concept.\n\nOften William Jones' book A New Introduction to Mathematics from 1706 is cited as the first text where the Greek letter π was used for this constant, but this notation became popular once Leonhard Euler adopted it some years later, \n\nThe ancient Babylonians used the fraction 355/113 (= 3.141592) (accurate to 6 decimal places) for pi, nearly 4,000 years ago, and I believe the Sumerians did before them. So it goes way back beyond the Greek civilisation.
648028
Pi is the ratio of the circumference of a circle to its radius.  Of course, this ratio exists whether we're aware of it or not, whether we think it's important or not.  Many ancient cultures had some sort of approximation to pi.  I don't know if the culture that built Stonehenge was one.  But I do know that there is a tendency to "see" a lot of things in an important monument like Stonehenge that may or may not have been intended by its makers.