Illustration of triangle
- 1 equilateral
- 2 acute
- 3 obtuse
- 4 scalene
- 5 isosceles
- 6 right triangle
triangle
noun
tri·an·gle
ˈtrī-ˌaŋ-gəl 
1
: a polygon having three sides compare spherical triangle
2
a
: a percussion instrument consisting of a rod of steel bent into the form of a triangle open at one angle and sounded by striking with a small metal rod
b
: a drafting instrument consisting of a thin flat right-angled triangle of wood or plastic with acute angles of 45 degrees or of 30 degrees and 60 degrees
3
: a situation in which one member of a couple is involved in a love affair with a third person
Examples of triangle in a Sentence
She cut the sandwiches into triangles.
Recent Examples on the Web
The film, which hits theaters April 26, centers on a love triangle between three tennis players with deeply competitive spirits both in the game and off the court.
—
Steven J. Horowitz, Variety, 19 Apr. 2024
There has also been a theory that Shevchenko was involved in a love triangle between UFC women’s bantamweight champion Holly Holm and MMA fighter Jon Jones.
—Dina Kaur, The Arizona Republic, 15 Apr. 2024
See all Example Sentences for triangle 
Steven J. Horowitz, Variety, 19 Apr. 2024
There has also been a theory that Shevchenko was involved in a love triangle between UFC women’s bantamweight champion Holly Holm and MMA fighter Jon Jones.
—Dina Kaur, The Arizona Republic, 15 Apr. 2024
See all Example Sentences for triangle
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'triangle.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Dictionary Entries Near triangle
Cite this Entry
“Triangle.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/triangle. Accessed 4 May. 2024.
Copy CitationKids Definition
triangle
noun
tri·an·gle
ˈtrī-ˌaŋ-gəl
1
: a figure that has three sides and three angles : a polygon that has three sides
2
: a percussion instrument made of a steel rod bent into a triangle open at one corner which is played by striking with a metal rod
3
: a drafting instrument consisting of a thin flat right-angled triangle
Medical Definition
triangle
noun
tri·an·gle
ˈtrī-ˌaŋ-gəl
: a three-sided region or space and especially an anatomical one see anterior triangle, carotid triangle, femoral triangle, posterior triangle, suboccipital triangle
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