p(EI) = PIE !!!!!! :)

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Across
  1. 2. half the diameter of a circle
  2. 7. this a famous food on pi day
  3. 8. a fixed value
  4. 10. his birthday is today
  5. 11. pi day
  6. 12. best math teacher
Down
  1. 1. Greek letter symbolizing pi
  2. 3. not expressible as a ratio of two integers
  3. 4. circular shape
  4. 5. started Day pi day celebration-"prince of pi"
  5. 6. related to math
  6. 9. the number representing the ratio of a