Across
- 4. line that passes through the center of a circle
- 6. branch of math that deals with lines, points, etc.
- 7. closed, round shape
- 9. comparison of two numbers
- 11. Their birthday is March 14
- 13. total length around the outside of a closed figure
Down
- 1. did the first calculation of pi
- 2. decimal number you can't write as simple fraction
- 3. amount of space occupied by a 3D figure
- 5. month Pi Day is celebrated
- 8. 3D figure that has two parallel circular faces
- 10. ratio of the circumference of a circle to its diameter
- 12. curved surface that looks like a ball