mono-bi-tri

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Across
  1. 2. complete control over a service or product within a given area
  2. 3. sides and angles of right triangles
  3. 8. tiresome lack of variation
  4. 9. occurring once every 300 years
  5. 10. having two legislative branches or chambers
Down
  1. 1. a long speech or reading given by a single speaker
  2. 4. occurring every 3 years or lasting 3 years
  3. 5. speech with little or no change in voice
  4. 6. occurring every two years
  5. 7. having two parts or components