math vocabulary thing im not to sure

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Across
  1. 4. never-ending number
  2. 7. a polygon with 12 faces
  3. 9. repeated addition
  4. 10. X and Y ____
Down
  1. 1. two weeks
  2. 2. >90
  3. 3. its straight
  4. 5. 1 per every 10
  5. 6. 36 ____ squared
  6. 8. 0,0