PI

ALBERT EINSTEIN

• Pi Day is an annual US celebration commemorating the mathematical constant

ARCHIMEDES

• The first calculation of pi was done by Archimedes of Syracuse one of the greatest mathematicians of the ancient world.
• Archimedes showed that pi is between 3 1/7 and 3 10/71.

PI

• The ancient Babylonians calculated the area of a circle by taking 3 times the square of its radius
• The Egyptians calculated the area of a circle by a formula that gave the approximate value of 3.1605 for pi.

A similar approach was used by Zu Chongzhi, a brilliant Chinese mathematician and astronomer.