math time

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Across
  1. 4. : is earning based on a percentage of total amount of sales
  2. 6. : 3d shape with one base and no point
  3. 8. : is a fee paid
  4. 10. alphabetic : character representing a number
  5. 13. : two angles are supplementary when they add up to 180 degrees
  6. 16. : a selection is taken from a large group
  7. 18. rates : used in calculating miles per hour
  8. 19. : written statement
  9. 20. angle : is equal to 90 degrees
Down
  1. 1. : is a relationship between two of the same number
  2. 2. : is the measure of the amount of space inside a 3d shape
  3. 3. : angles other than the right angle are add up to 90 degrees
  4. 5. : event measure for a chance when the event result of an example
  5. 7. : a number or symbol multiplied with a variable
  6. 9. tax : percentage added to the buyers cost
  7. 11. : is a whole number
  8. 12. area : is the sum of the areas of its faces
  9. 14. : is the large group of people
  10. 15. : is a symbol
  11. 17. : 3d shape with one base and have a point