Across
- 3. occurring every two months
- 9. mathematics involving sides and angles of triangles
- 11. a period of 300 years
- 12. exclusive control over something
- 15. athletic contest with three events
- 16. used everywhere
- 17. involving two
- 18. two branches of government
- 20. occurring every two weeks
Down
- 1. speaking solo
- 2. a single leg support
- 4. occurring or lasting three years
- 5. a single track for wheeled vehicles
- 6. including three colors
- 7. speaking or knowing only one language
- 8. three legged support device
- 10. sameness or lack of variety
- 13. three babies at one birth
- 14. happening every two years
- 16. to become one
- 17. two muscles located at the front of the upper arm
- 18. cut in two equal parts
- 19. a series of three books or plays