math :D

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Across
  1. 5. a rising or falling surface
  2. 6. another step added from the 1 step equation
  3. 9. substitution for an unknown numerical value
  4. 14. the bottom surface of a 3D object
  5. 20. the perimeter of a circle
  6. 22. the greatest amount minus the least amount
  7. 23. what does MAD stand for?
  8. 24. 1 less step than a 2 step equation
  9. 26. an angle more than 90 degrees
  10. 28. a number that is not a fraction
  11. 29. changing the size of a shape
Down
  1. 1. data that is represented by dots
  2. 2. half of the diameter
  3. 3. the amount of space in a 3d object
  4. 4. the average of a group of numbers
  5. 7. when expressions have the same value
  6. 8. the middle number of the data
  7. 10. the amount of space covered in an object
  8. 11. number a number that is less than zero
  9. 12. the amount out of 100
  10. 13. twice the radius
  11. 15. the most occurred number
  12. 16. an angle less than 90 degrees
  13. 17. when expressions do not have the same value
  14. 18. can also be a decimal
  15. 19. an exact copy of a shape
  16. 21. moving the shape
  17. 22. turning the shape
  18. 25. can also be a fraction
  19. 27. the smaller side lengths of a triangle