What does Pi in mathematics mean?

Answer 1

pie is the specific value used to find 'c' ,'sa','v',etc. It is the approximate value given or used instead of 3.1415......to perform calculations.

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If the questioner actually meant the Greek letter "Pi" (not "Pie"), then it is the ratio of circumference to diameter of a circle, = 3.1416....., and occurs in all manner of calculations ranging from simple circular mensuration to wave analysis.

Answer 2

Pi or "π" is a mathematical constant that is the ratio of a circle's circumference to its diameter. The constant, sometimes written pi, is approximately equal to 3.14159.

In more simpler words, if you measure the circumference, and then divide by the diameter of the circle you get the number π.

Answer 3

Pi is the 16th letter of the Greek alphabet and in terms of mathematics its value is a circle's circumference divided by its diameter and its first 3 digits are 3.14 but its true value has never been determined because pi is an irrational number.