Pi Day is a day celebrated on March 14 around the world which celebrates Pi (Greek letter “π”), the symbol used in mathematics to represent the ratio of the circumference of a circle to its diameter (a constant).

The ratio always starts with 3.14, no matter the size of the circle. Which is why Pi Day is celebrated on March 14 (3/14 in American date format).

The first Pi Day was declared in 1988 by Larry Shaw, an employee of the Exploratorium in San Francisco and has been celebrated ever since.

At Royal High School Bath we are celebrating Pi Day with a range of activities during tutor times, including a challenge for students to create their own Pi-Ku (a Haiku poem about Pi) and a Pi-filled online activity sheet.

There have also been opportunities for staff to join in by wearing Pi badges and enjoying some Pi cookies.