Encyclopedia: PI...
Encyclopedia : P : PI : PI (4 articles)
Pi
A visual definition of π as the ratio of the circumference of a circle to its diameter The mathematical constant π is an irrational number, approximately equal to 3.14159, which is the ratio of a circle's circumference to its diameter in Euclidean geometry, and has many uses in mathema..
From Wikipedia, the Free Encyclopedia. Article contents subject to the GNU Free Documentation License.
