1. { Word List: tri-

2. triangle a three-sided figure

3. triangle A triangle can be equilateral. {equal side}

4. triathlon a race that combines three activities—swimming, bicycling and running

5. triceratops a dinosaur with three horns—two long horns above the eyes and one short horn on the nose

6. tricycle a vehicle with three wheels

7. trilateral having or involving three sides, countries, or parties

8. trilingual able to speak three different languages

9. trilogy three related plays or novels

10. trio a group of three people or things

11. tripod a three- legged stool, table or stand to hold things, such as a camera

12. trisect to cut into three parts

13. sect = cut lateral = side

14. Perimeter means adding all the sides together.