tri ‧ an ‧ gu ‧ lar /traɪˈæŋɡjələ, traɪˈæŋɡjʊlə $ -ər/ BrE AmE adjective
1 . shaped like a triangle
2 . involving three people or teams:
a triangular sporting competition
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THESAURUS
■ describing types of shapes
▪ square shaped like a square:
a square box
▪ circular/round shaped like a circle:
a circular table
▪ semicircular shaped like a semicircle:
a semicircular arch above the door
▪ triangular shaped like a triangle:
sails divided into triangular sections
▪ rectangular shaped like a rectangle:
a simple rectangular building
▪ oval shaped like an oval:
an oval swimming pool
▪ cylindrical shaped like a cylinder:
The statue is on top of a tall cylindrical column.
▪ spherical shaped like a ball:
The planet Saturn is not completely spherical.