Historically one of the early methods of estimating the value of π was by taking a circle and inscribing and circumscribing a regular polygon (constructing a regular polygon inside and outside the circle- they knew how to do that mathematically 500 BC in Greece for a great number of polygons) They took the average of the circumferences of the polygons and divided that by the average of the diameters of the polygons to approximate a value for π.
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The circumference of any circle divided by its diameter is always equal to pi.
Study of circles. It was derived by mathematicians(Greek?) who developed an infinite series to describe it.
The circumference of any circle divided by its diameter is always equal to pi and its exact value has never been discovered because its decimal places run into infinity and in math only an approximation of its value is used.
The value of pi (Ï€) is3.1415926535897932384626433832795028841971693993751.........
No one has fully discovered pi. Pi is believed to be irrational.