Pi day

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Across
  1. 1. pi is a mathematical (blank)
  2. 2. what individual mathematician first took on the problem of π?
  3. 4. 2 pi s what
  4. 5. Who currently holds the record for reciting the most digits of Pi (last name only)?
  5. 6. who improved Archimedes' value of π?
  6. 8. pi is a (this kind of) number
  7. 10. what day is pi day celebrated on?
  8. 13. what month is pi day in
Down
  1. 1. pi*d = ?
  2. 2. pi r^2 = ?
  3. 3. which Egyptian scholar was most influential in the history of pi?
  4. 7. 3.14
  5. 9. who approximated the value of π to about 22/7?
  6. 11. first number of pi
  7. 12. what kind of letter is pi?