{ Word List: tri-

triangle a three-sided figure

triangle A triangle can be equilateral. {equal side}

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

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

tricycle a vehicle with three wheels

trilateral having or involving three sides, countries, or parties

trilingual able to speak three different languages

trilogy three related plays or novels

trio a group of three people or things

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

trisect to cut into three parts

sect = cut lateral = side

Perimeter means adding all the sides together.