Math Crossword

12345678910111213141516171819202122232425262728293031323334353637383940
Across
  1. 2. (+,-)
  2. 3. XL
  3. 5. A Quadrilateral
  4. 8. (-,+)
  5. 9. Has seven sides
  6. 11. 2
  7. 12. (+,+)
  8. 14. X
  9. 15. I
  10. 17. Has ten sides
  11. 19. XII
  12. 22. VII
  13. 24. 22 (BTW my fav. song)
  14. 27. Has nine sides
  15. 28. Has six sides
  16. 29. ____ of Syracuse
  17. 30. L
  18. 31. XV
  19. 32. LXX
  20. 33. 18
  21. 35. XI
  22. 36. XC
  23. 38. 6
  24. 40. LXXX
Down
  1. 1. XVI
  2. 4. Point of intersection of two axes
  3. 6. (-,-)
  4. 7. ____ of Alexandria
  5. 10. Has five sides
  6. 11. 3
  7. 13. XIV
  8. 16. V
  9. 18. Has Has eight sides
  10. 19. XX
  11. 20. Has three sides
  12. 21. XVII
  13. 23. XIX
  14. 24. XIII
  15. 25. 4
  16. 26. ____ Descartes
  17. 34. VIII
  18. 37. XXX
  19. 39. LX