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When was the the circumference of the Earth first measured and by who?
One possible person is Eratosthenes of Cyrene ~230 BC as he was a Greek scientist who calculated the circumference of the Earth, with remarkable accuracy (some values for the "stadia" he used gives a result within 6% of the actual polar circumference). See link for further information
Why was the Greek letter p used as the symbol for pi?
The Greek letter π (pi) was adopted as the symbol for the mathematical constant representing the ratio of a circle's circumference to its diameter primarily by the Welsh mathematician William Jones in 1706. He chose π because it is the first letter of the Greek word "periphery," which relates to the circumference of a circle. The use of π became widely accepted after the famous mathematician Leonhard Euler popularized it in the 18th century.
Who was the greek geometry mathematician?
Pythagoras
Who is the Greek mathematician who invented an easier way of finding the GCF?
Euclid is the Greek mathematician who invented an easier way of finding the GCF.
Who invented trignometry?
hipparcus a greek mathematician
