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TOEFL IELTS BNC: 5296 COCA: 5605

triangle

noun
/ˈtraɪæŋɡl/
/ˈtraɪæŋɡl/
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  1. a flat shape with three straight sides and three angles; a thing in the shape of a triangle三角形；三角形物体
    • Cut the sandwiches into triangles.把三明治切成三角形。
    see also equilateral triangle, isosceles triangle, right-angled triangle, right triangle, scalene triangle, warning triangle
    Extra Examples
    • Use your protractor to construct an equilateral triangle.用量角器作一个等边三角形。
    • a large region resembling an inverted triangle近似一个倒三角形的大区域
    Topics Colours and Shapesb2
    Oxford Collocations Dictionaryadjective
    • equilateral
    • isosceles
    • right
    • …
    verb + triangle
    • construct
    • draw
    • form
    • …
    phrases
    • the apex of a triangle
    See full entry
  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三角铁（打击乐器）Topics Musicc2
  3. a situation involving three people in a complicated relationship三角关系
    • the romantic triangle at the centre of the novel小说中心的浪漫三角
    see also eternal triangle, love triangle
  4. (North American English)
    (British English set square)
    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°三角板；三角尺
    5. Word Originlate Middle English: from Old French triangle or Latin triangulum, neuter of triangulus ‘three-cornered’ (see tri- and the noun angle).

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