There have been many estimations of Pi by many scientists over the years. To answser this questions, more information is needed. You might also see the link on the history of Pi.
The value of Pi is 3.14 so the value of Pi by 2 is 6.28.
The value for Pi for math is 3.14. Pi is the 16th letter in the Greek alphabet.
the value of pi can be derived as the ratio between the circumference and diameter of every circle, say pi = circumference/diameter
pi is approximately equal to: 3.141592653589793238462643383279...
Consider a distribution with an unknown parameter pi. If the true value of pi is not known but has been estimated, then the estimated value is usually denoted by pi-hat. This is to distinguish between a known parameter and an estimated one.
At around 1900 B.C., Egyptians estimated the value of pi to be 256 / 81 .
At around 1900 B.C., Egyptians estimated the value of pi to be 256/81.
Archimedes
pi has been around for as long as we have had written records.Its approximate estimated value of Pi up to 5 decimal places is 3.14159 .Archimedes was the first person to estimate the correct value of pi
p c ray
Archimedes accurately estimated the value of pi. He was also the Greek inventor that created the compound pulley and first device used for extracting water from below the surface of the earth as well.
Lots of scientists have worked on evaluating pi. The question needs to be a little ,ore specific.
The value of pie calculated by first Indian scientist Baudhayana
Lots of people did this; the accuracy increased over time.
From Hellenistic culture we get theories on astronomy, mathematics, and physics. Aristarchus's theories include, that the sun was 300 times larger than the earth, but he grossly underestimated it, and the earth and other planets revolve around the sun. Eratosthenes estimated earths circumference to be 28,000-29,000 miles long, close to the actual circumference. From Hellenistic culture we get the Pythagorean theorem and pi (the ratio of a circumference of a circle to its diameter) Archimedes (who also estimated pi) discovered the law of the lever. He invented a screw that lifts water from the ground and the pulley.
Archimedes was the first Western mathematician to make a serious attempt at calculating the value of pi. His estimated, that pi was between 3.1408 and 3.1429.