In Archimedes' day, close approximations of pi had been known for over 1,000 years. An Egyptian document dated to 1650 B.C., for example, gives a value of 4 (8/9) 2, or 3.1605. Archimedes' value ...

By 150 CE, Ptolemy had the value of pi at 3.1416, which he may have done using the Archimedean method. Archimedes used ...

Approximations for the mathematical constant pi () in the history of mathematics reached an accuracy within 0.04% of the true value before the beginning of the Common Era (Archimedes). In Chinese ...

Pi Day is Friday ... plants and even lifting water for some amusement park rides. Archimedes also created a means for ...

Archimedes determined the upper and lower range of pi by finding the perimeters of ... of the circle and thereby come up with his approximation. Values are shown in decimal notation rather than ...