H&H Pi Day Crossword

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