8th Grade Crossword Puzzle!

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Across
  1. 4. an unknown number
  2. 7. the number thats being multiplied by the exponent
  3. 8. negative numbers
  4. 9. opposite of addition
  5. 12. line that equals 180
  6. 13. an object getting bigger or smaller
  7. 15. angle thats greater than 90, less than 180
  8. 18. opposite of division
  9. 19. opposite of subtraction
Down
  1. 1. origin
  2. 2. a plot that has a negative or positive association
  3. 3. the opposite of its own image
  4. 5. something that moves counterclockwise or clockwise
  5. 6. opposite of division
  6. 10. angle thats equal to 360
  7. 11. opposite of multiplication
  8. 14. positive numbers
  9. 16. the number that tells the base what to do
  10. 17. angle thats equal to 90
  11. 19. angle thats less than 90