Coldness and Math

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Across
  1. 2. A 8 sided Polygon
  2. 5. The opposite of Ice
  3. 6. a 3d shape
  4. 7. A blue crystal
  5. 10. take something a put it somewhere else
  6. 11. A number that is only divisible by 1 and itself.
  7. 14. Take Something Away in math
  8. 15. One Tenth of A second
  9. 17. A 9 sided Polygon
Down
  1. 1. A snow hill
  2. 3. Things that are made of water floating in the sky
  3. 4. the middle of something
  4. 8. A Thing that lifts that has buttons
  5. 9. how many groups
  6. 11. the dwarf planet you know
  7. 12. Something that is water but freezed
  8. 13. Count to 1
  9. 14. Something you make with snow or snowballs
  10. 16. a storm that storms snow