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On March 14 students worldwide celebrated the mathematical constant-Pi (also noted as 3.14 or π).

Pi is an irrational number. That means it continues indefinitely, without repetition or pattern, and it also makes memorizing it a fun challenge.

Pi (as defined in the Webster dictionary) is “The symbol denoting the ratio of the circumference of a circle to its diameter. A transcendental number having a value rounded to eight decimal places of 3.14159265.”

Pi Day was also an opportunity for Travis Elementary to promote mathematics education and remind students that the math they’re learning is used every day by real people in the real world. Students and staff were encouraged to dress like their “Think Through Math” avatars and they earned points for solving math problems. Students could then use their points to obtain accessories for their avatars, such as hats, skateboards, colored hair, or pets.

The first known Pi Day celebration was in 1988 at San Francisco’s Exploratorium science museum and it has grown over the years to include museums, businesses and schools around the world.

National Pi Day became a national holiday after the House of Representatives designated it in 2009 with a resolution that “encourages schools and educators to observe the day with appropriate activities that teach students about pi and engage them about the study of mathematics.”