pi is the ratio between the radius and the circumference of the circle if the radius is 1 the circumference is pi
it came from Sir Alan Pi in 1898. he died 1 day after discovering it through being sniped by a Barrett .50cal
This is a link that answers your question. http://www.gap-system.org/~history/HistTopics/Pi_through_the_ages.html
pi is a mathematical formula, or 3.14159265389793238462683. it relates to the diameter and circumference of a circle. i don't know the history but im sure its somwhere!answ2. There is currently a proposal to name 2 Pi as Tau, as this aids in many calculations. Watch this space. The ratio of the perimeter to the height of Khufu's Pyramid is 2 Pi.
Pi is the number you get by dividing a circle's circumference by its diameter. It is irrational. It is 3.1415926535897. Every generation, people figured out another few didgets of pi.
// macro definitions: #define PI 3.14159265358979323846 #define CIRCUMFERENCE(radius) (2. * (radius) * PI) // use this as in CIRCUMFERENCE(21.34)
Pi is a number between 3.14159265358979323846264338327950288419716939937510 and 3.14159265358979323846264338327950288419716939937511 First estimated by Greek mathematician Archimedes around 250 B.C., Chinese mathematician Zu Chong Zhi confirmed the actual value of pi. Pi is the ratio of the circumference to the diameter of a circle and appears as a constant in many mathematical expressions. It is represented by the symbol π. It has over 200 billion decimal places.
Pi is approximately 3.1415
The history of pi dates back to ancient civilizations, such as the Babylonians and Egyptians, who approximated the value of pi. The first accurate calculation of pi was made by the Greek mathematician Archimedes in the 3rd century BC. The symbol for pi was introduced by the Welsh mathematician William Jones in the 18th century, and it has since become one of the most important mathematical constants in mathematics.
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Ratio of the perimeter of a circle (circumference) to its diameter
define the following write the units and formula