Finesentence mobile logo
Sign in Login / Register

Triangle: meaning, definitions and examples

🔺
Add to dictionary

triangle

 

[ ˈtraɪ.æŋ.ɡəl ]

Noun
Context #1 | Noun

geometric shape

A triangle is a three-sided polygon that consists of three edges and three vertices. The sum of the internal angles of a triangle always equals 180 degrees. Triangles can be classified based on their angle measures as acute, right, or obtuse, and by the length of their sides as equilateral, isosceles, or scalene. Triangles are fundamental in various fields, including mathematics, engineering, and architecture.

Synonyms

triangular shape, trigon.

Examples of usage

  • The triangle has three sides.
  • We studied different types of triangles in math class.
  • The roof was shaped like a triangle.

Translations

Translations of the word "triangle" in other languages:

🇵🇹 triângulo

🇮🇳 त्रिकोण

🇩🇪 Dreieck

🇮🇩 segitiga

🇺🇦 трикутник

🇵🇱 trójkąt

🇯🇵 三角形

🇫🇷 triangle

🇪🇸 triángulo

🇹🇷 üçgen

🇰🇷 삼각형

🇸🇦 مثلث

🇨🇿 trojúhelník

🇸🇰 trojuholník

🇨🇳 三角形

🇸🇮 trikotnik

🇮🇸 þríhyrningur

🇰🇿 үшбұрыш

🇬🇪 სამკუთხედი

🇦🇿 üçbucaq

🇲🇽 triángulo

Etymology

The term 'triangle' comes from the Latin word 'triangulum,' which means 'three-cornered.' This Latin term is derived from the prefix 'tri-' meaning 'three' and 'angulus' meaning 'angle.' The use of the triangle in geometry dates back to ancient civilizations, including the Egyptians and Greeks, who utilized its properties in construction, astronomy, and mathematics. The triangle's importance is also highlighted in the study of trigonometry, which is the branch of mathematics that deals with the relationships between the angles and sides of triangles. Over centuries, the triangle has remained a central figure in both theoretical and applied mathematics.

Word Frequency Rank

At #6,452 in frequency, this word belongs to advanced vocabulary. It's less common than core vocabulary but important for sophisticated expression.