math stuff

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Across
  1. 5. a percent of 100
  2. 7. a measurement of water
  3. 8. the bottom of a pyramid
  4. 9. horizantal line on a grid
  5. 10. a result obtained by dividing one quantity by another
  6. 14. the relation between 2 amounts
  7. 15. 2 rays with the same end point
  8. 16. the area of a circle
  9. 17. a measurement of water
  10. 19. a relative value indicating hundredth parts of any quantity
  11. 21. it is up and down
Down
  1. 1. a information display
  2. 2. it is side to side
  3. 3. a grid plan with cordantes
  4. 4. the action or habit of estimating something as worthless
  5. 6. a fixed reference line for the measurement of coordinates
  6. 11. the coordinates 0,0
  7. 12. a table using dots to display info
  8. 13. the amount of space a substance uses
  9. 18. the amount of space inside a shape
  10. 20. the study of numbers