PI Day Crossword

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Across
  1. 2. White Day and Pi Day are on ___ 14th!
  2. 4. 3. ___ 14159
  3. 7. A three-sided shape
  4. 14. 1/2, 1/3, 1/4, 1/5, ...
  5. 15. This ___ is sweet!
  6. 16. The ___ of a circle = 2 * pi * r
  7. 18. Mathematics, but a shorter word
  8. 19. In America, we don't celebrate ___ Day.
  9. 21. 1, 2, 3, 4, 5, 6, ...
  10. 22. ___ . 14159...
  11. 23. 直径
Down
  1. 1. You probably study this subject at school.
  2. 3. 3.1 ___ 159
  3. 5. You can eat this パイ.
  4. 6. White Day and Pi Day are on March ___!
  5. 8. It is a round shape, like a pie
  6. 9. It's half of the diameter.
  7. 10. The ___ of a circle = pi * r^2
  8. 11. You cannot eat this パイ.
  9. 12. It never ends!
  10. 13. The ___ got chocolate on Valentine's Day.
  11. 17. I will eat a lot of pie on Pi Day!
  12. 18. This line is 2 meters long. I ___ it.
  13. 20. Please try to ___ all the Pi numbers.