The Pi Crossword

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Across
  1. 3. The first calculation of "π" was done by A................
  2. 4. Pi is celebrated on 14th M...........
  3. 7. Pi is a mathematical c...........
  4. 8. Pi is an irrational n........that never ends.
Down
  1. 1. Archimedes was a great m........... of the ancient world.
  2. 2. Archimedes was from G........
  3. 5. We cannot memorize all the Pi d.........
  4. 6. "π" is a Greek l.......
  5. 7. Pi is used to calculate the c .........