Greek and Latin Number Prefixes mono- bi- tri-

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Across
  1. 3. occurring every two years
  2. 6. a group of three books by the same author in order or in sequence
  3. 7. the branch of mathematics concerned with specific functions of angles and their application to calculations
  4. 8. lack of variation
  5. 10. a single rail track used for passenger to travel
Down
  1. 1. having two legislative branches or chambers
  2. 2. involving two things
  3. 4. speech with little to no change in tone
  4. 5. occurring once every three hundred years
  5. 9. occurring every three years or lasting three years