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Adjective: triangular  trI'ang-gyu-lu(r)
  1. Having three angles; forming or shaped like a triangle
    "a triangular figure"; "a triangular pyramid has a triangle for a base"
  2. Having three sides
    "a triangular figure";
    - trilateral, three-sided

See also: angular, angulate, many-sided, multilateral

Encyclopedia: Triangular