Across
- 4. Last name of a famous scientist who was born on Pi Day in 1879
- 9. Point used to separate integer and non-integer numbers
- 10. Distance from the center of a circle to it's sircumference
- 12. Outside edge of a round object
- 15. Closed, round shape
Down
- 1. Last name of a famous scientist who died on Pi Day in 2018
- 2. First digit of pi
- 3. Fifth digit in pi
- 5. Straight line passing through the center of a circle
- 6. The number of digits in pi
- 7. The ratio of a circle's circumference to its diameter
- 8. Pi is the sixteenth letter of this alphabet
- 11. Ratio of the circumference of a circle to its diameter
- 13. Comparison of two numbers
- 14. Month when Pi Day is celebrated