Math revision

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Across
  1. 6. estimating the chances after an experiment
  2. 7. √
  3. 8. numbers that can be square rooted perfectly
  4. 9. 3.1415926535
  5. 12. calculating 2 or more events probability
  6. 14. the number that appear more than once during the expansion of numbers
  7. 16. a strong prediction that you want to happen
  8. 18. the line opposite to the right angle
  9. 20. theorem a2+b2=c2
Down
  1. 1. the chance of an event happening
  2. 2. calculations with variables
  3. 3. ∏r2 gives you the area of a______
  4. 4. Events that are not been experimented on
  5. 5. half of Diameter
  6. 10. the exterior length of a circle
  7. 11. the expansion of numbers
  8. 13. The addition of number
  9. 15. a space of all the possible outcomes
  10. 17. the exterior length
  11. 19. a one-sided opinion