Pi Day - March 14th

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Across
  1. 2. The first large and official celebration of the day took place at the San Francisco ________in 1988.
  2. 5. At the inaugural event, people marched around a circular space and ate _____ ____.(2 words)
  3. 6. The symbol "π" was first used in 1706 by William _______.
  4. 9. Pi Day celebrates the pi symbol (π) and its importance to _________.
Down
  1. 1. Pi is used in mathematics to represent the ratio of the _________ of a circle to its diameter.
  2. 3. It was organized by Larry Shaw, a _______at the Exploratorium.
  3. 4. The first digits of this ratio are 3.14159, and the number continues _________ without pattern.
  4. 7. It gained in popularity after being used by _____ mathematician Leonhard Euler in 1737.
  5. 8. The symbol is a ______ letter.