Pi
Irrational number symbolized by a Greek letter (3.1415……)
The symbol π (pronounced pi) represents a mathematical constant that is the ratio of the circumference of a circle to its diameter. It is approximately equal to 3.14159, though the digits continue infinitely without repetition.
Pi is an irrational number, which means that it cannot be expressed exactly as a ratio of two integers. This property makes pi an important and interesting number in mathematics, as it appears in many different formulas and calculations, including those used in geometry, trigonometry, and analysis.
Pi has fascinated mathematicians, scientists, and philosophers for thousands of years. The ancient Egyptians and Babylonians were aware of the existence of pi, and the Greek mathematician Archimedes was the first to rigorously calculate an accurate approximation of the value of pi.
Today, pi is used in a wide variety of fields, including physics, engineering, statistics, and computer science. It is also celebrated annually on March 14th (or 3/14), which is often referred to as Pi Day.
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