Tri, Bi, Uni, Cent

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Across
  1. 4. to divide into two equal parts
  2. 6. three sided shape
  3. 11. a 100 foot long insect
  4. 15. two eye holes used for seeing far objects
  5. 16. 100 years
  6. 18. when you reach third base in baseball
  7. 19. where people go to study after high school
  8. 20. where outerspace is
Down
  1. 1. every two weeks
  2. 2. having three wheels
  3. 3. equaled to 100th of a meter
  4. 5. three of something
  5. 7. having two wheels
  6. 8. to bring everyone together as one
  7. 9. Three legged stand, usually for a camera
  8. 10. something done at the exact same time
  9. 12. having one wheel
  10. 13. a mythically horse with one horn
  11. 14. three babies born at one time
  12. 17. the same clothing worn by employees