PI day Crossword puzzle

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Across
  1. 4. Total length across the circle going across the middle
  2. 7. Comparison of 2 figures
  3. 8. The first to calculate Pi
  4. 11. The letter after pi in the greek alphabet
  5. 12. A homophone of pi
Down
  1. 1. Type of Math that deals with angles
  2. 2. How many numbers does pi have?(clue:not finite)
  3. 3. Round, closed shape
  4. 5. Pie The most american pie
  5. 6. The language that pi is a part of
  6. 9. distance from 1 point to center of circle
  7. 10. Mont pie day is celebrated