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Noun triangle has 4 senses
  1. triangle, trigon, trilateral - a three-sided polygon
    --1 is a kind of polygon, polygonal shape
    --1 has particulars:
     acute triangle, acute-angled triangle; equilateral triangle, equiangular triangle; isosceles triangle; oblique triangle; obtuse triangle, obtuse-angled triangle; right triangle, right-angled triangle; scalene triangle; wedge, wedge shape, cuneus
    Derived forms: verb triangulate1, verb triangulate3
  2. triangle - something approximating the shape of a triangle; "the coastline of Chile and Argentina and Brazil forms two legs of a triangle"
    --2 is a kind of     shape, form
  3. triangle - any of various triangular drafting instruments used to draw straight lines at specified angles
    --3 is a kind of     drafting instrument
  4. triangle - a percussion instrument consisting of a metal bar bent in the shape of an open triangle
    --4 is a kind of     percussion instrument, percussive instrument
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