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
Then we’re supposed to have guys build a triangle around.
—
Brad Biggs, Chicago Tribune, 28 Oct. 2024
Make a rough triangle between Altair and Vega pointing down to the horizon — the third point is roughly where the comet will be.
—Jamie Carter, Forbes, 27 Oct. 2024
Two identical charts below: Converging trendlines... otherwise known as a symmetrical triangle chart pattern, depict the standoff of the past 8 months.
—Carter Braxton Worth, CNBC, 25 Oct. 2024
That view plane is essentially an invisible triangle the caps building heights on the properties that fall within it.
—Joe Rubino, The Denver Post, 21 Oct. 2024
See all Example Sentences for triangle 
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Brad Biggs, Chicago Tribune, 28 Oct. 2024
Make a rough triangle between Altair and Vega pointing down to the horizon — the third point is roughly where the comet will be.
—Jamie Carter, Forbes, 27 Oct. 2024
Two identical charts below: Converging trendlines... otherwise known as a symmetrical triangle chart pattern, depict the standoff of the past 8 months.
—Carter Braxton Worth, CNBC, 25 Oct. 2024
That view plane is essentially an invisible triangle the caps building heights on the properties that fall within it.
—Joe Rubino, The Denver Post, 21 Oct. 2024
See all Example Sentences for triangle
Dictionary Entries Near triangle
Cite this Entry
“Triangle.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/triangle. Accessed 12 Nov. 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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