pi day

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Across
  1. 2. Pi Day is a chance to explore the wonders of math.
  2. 5. Pi is used in formulas for finding the volume of this shape.
  3. 6. The relationship between two quantities, like circumference and diameter.
  4. 9. Archimedes used polygons for a close estimation of pi.
  5. 10. Pi appears often in equations in this branch of math.
  6. 11. What you do to find the circumference of a circle.
  7. 14. Pi is a mathematical constant that doesn't change.
  8. 16. The subject celebrated on Pi Day.
  9. 17. What you do to a pie on Pi Day.
  10. 19. Pi Day is an opportunity to learn about math.
  11. 20. Pi is derived from the Greek word for "periphery."
Down
  1. 1. In calculus, pi appears when finding the rate of change of certain functions.
  2. 3. Pi's representation that extends infinitely as this.
  3. 4. Common flavor of pies enjoyed on Pi Day.
  4. 7. Finding the circumference involves this process.
  5. 8. Pi is related to angles in this branch of math.
  6. 12. Half the diameter of a circle.
  7. 13. The study of shapes and their properties.
  8. 15. A trigonometric function where pi plays a role in its periodicity.
  9. 18. A Swiss mathematician who contributed to our understanding of pi.