The symbol used by mathematicians to represent the ratio of a circle's
circumference to its diameter is the lowercase Greek letter π, sometimes spelled
out as pi.
What is Pi? Who first used Pi? How do you find it? What is it for? How many digits
Pi (π) is the ratio of the circumference of a circle to its diameter. ... Archimedes
used this trick with 96 sided polygons to correctly estimate Pi to about two digits ...
Apr 30, 2013 ... Pi (π), the 16th letter of the Greek alphabet, is used to represent the most widely
known mathematical constant. By definition, pi is the ratio of the ...
Pi is used in many calculations, including finding the circumference and area of a
circle, and the volume and surface area of a sphere, cone, and cylinder. Pi is ...
Mar 13, 2012 ... iReporter Zeynep Rice made this pie to celebrate Pi Day. .... H/m that's units per
Henry per meter, where a Henry is a unit used in electronics.
around the edge of the circle) will be Pi. Pi (the symbol is the Greek letter π) is: ...
There are many special methods used to calculate π and here is one you can ...
Dec 30, 2013 ... It is shared for Memoriad Memory & Mental Calculation mentathletes by courtesy
of CBS & CityTv. The subject is; What is Pi? What is it used for ...
Read all about the number pi and the mathematicians who have tried to find out
... is the symbol used for a special number which we call pi (pronounced "pie").
May 17, 1999 ... According to Petr Beckmann's A History of Pi, the Greek letter was first used for
this purpose by William Jones in 1706, probably as an ...