Number PI

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Across
  1. 3. The month pi day is celebrated
  2. 5. The symbol for pi came from the... alphabet
  3. 6. pi is an ... number
  4. 9. The distance across a circle through the center
  5. 12. Pi is the ...th letter of the Greek alphabet
  6. 15. Pi is also a ... number
Down
  1. 1. pi is the ratio of a ....'s circumference to its diameter
  2. 2. Famous mathematician who proved that pi is irrational
  3. 4. Famous scientist that died on pi day in 2018
  4. 7. pi is a ...
  5. 8. The first digit of pi
  6. 10. the distance around the circle
  7. 11. The number of digits pi has
  8. 13. Famous scientist born on pi day in 1879
  9. 14. The British Mathematician who introduced the pi symbol in 1706