in the greek alphabet, it is Rho, but in aincient greek it is San.
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The number that comes before pi is 3.14159265358979323846... which is the mathematical constant representing the ratio of a circle's circumference to its diameter. Pi is an irrational number, meaning it cannot be expressed as a simple fraction, and it is approximately equal to 3.14159. Therefore, the number before pi is 3.
Circumference of a circle : the circle's diameter
The symbol for pi (π), is the Greek letter that is the equivalent to the Roman p. It is the Greek letter pi. It is the first letter of the Greek word περίμετρος (perimetros) from which our word perimeter comes.
Pi is (the circumference of any circle) divided by (the same circle's diameter). Pi is an irrational number, meaning that no matter how long you carry out the decimal, it never comes out even. Pi has been computed out to several thousand decimal places. The first 15 decimal places of pi are: 3.14159 26535 89792
4 times pi, which comes to about 12.566.