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Meaning & Definition of Triangle in English

English

Triangle

/traɪæŋgəl/

noun

1. A three-sided polygon

    synonym:
  • triangle
  • ,
  • trigon
  • ,
  • trilateral

2. Something approximating the shape of a triangle

  • "The coastline of chile and argentina and brazil forms two legs of a triangle"
    synonym:
  • triangle

3. A small northern constellation near perseus between andromeda and aries

    synonym:
  • Triangulum
  • ,
  • Triangle

4. Any of various triangular drafting instruments used to draw straight lines at specified angles

    synonym:
  • triangle

5. A percussion instrument consisting of a metal bar bent in the shape of an open triangle

    synonym:
  • triangle

Examples of using

The square of the length of the hypotenuse of any right triangle is equal to the sum of the squares of the lengths of its base and vertical sides.
The area of a triangle is half of the area of the rectangle with equivalent base and height.
If a figure has three sides, it is a triangle.