Triangle ˈtraɪæŋɡl Shape Cut Sandwiches Piece Metal Noun

• a right-angled triangle
• a right triangle
• cut the sandwiches into triangles.
• a love triangle

triangle

1. a flat shape with three straight sides and three angles; a thing in the shape of a triangle
• a right-angled triangle
• a right triangle
• Cut the sandwiches into triangles.
2. a simple musical instrument that consists of a long piece of metal bent into the shape of a triangle, that you hit with another piece of metal
• See related entries: Musical instruments
  https://www.oxfordlearnersdictionaries.com/topic/musical_instruments/triangle
3. a situation involving three people in a complicated relationship
• see also eternal triangle
  https://www.oxfordlearnersdictionaries.com/definition/english/eternal-triangle
• a love triangle
4. an instrument for drawing straight lines and angles, made from a flat piece of plastic or metal in the shape of a triangle with one angle of 90°

Extra Examples

• I cut the sandwiches into triangles.
• Use your protractor to construct an equilateral triangle.
• a large region resembling an inverted triangle

Word Origin

• late Middle English: from Old French triangle or Latin triangulum, neuter of triangulus ‘three-cornered’ (see tri- and the noun angle).