math definition

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Across
  1. 1. two values to each other to get a value
  2. 4. it is different from multiplication
  3. 5. the angle is lower than 90 degrees
  4. 6. the angle is 90 degrees
  5. 8. the top part of a fraction
  6. 11. the lower part of a fraction
  7. 13. the middle of a line of values
  8. 14. the values together to make a smaller value
  9. 15. an angle that is bigger than 90 degrees, but lower than 180 degrees
Down
  1. 2. that the value is higher than 0
  2. 3. that the value is lower than 0
  3. 7. the most common values in a line of other values
  4. 9. two values together to make bigger values to get your answer
  5. 10. to add all the values then divided by the amount there is
  6. 12. the shape has more than 5 sides