a closed plane figure having three sides and three angles.
a flat triangular piece, usually of plastic, with straight edges, used in connection with a T square for drawing perpendicular lines, geometric figures, etc.
any three-cornered or three-sided figure, object, or piece: a triangle of land.
a musical percussion instrument that consists of a steel triangle, open at one corner, that is struck with a steel rod.
a group of three; triad.
a situation involving three persons, especially one in which two of them are in love with the third.
(initial capital letter)Astronomy. the constellation Triangulum.
Origin of triangle
1350–1400; Middle English <Latin triangulum, noun use of neuter of triangulus three-cornered. See tri-, angle1
OTHER WORDS FROM triangle
triangled,adjective
Words nearby triangle
trials and tribulations, trialware, triamcinolone, triamterene, Trianda, triangle, triangle inequality, triangle of auscultation, triangle of forces, triangle of safety, triangular
For example, you can change drawing A into drawing B by flipping the triangle made by nodes 1, 2 and 3 over the edge connecting nodes 2 and 3.
A New Algorithm for Graph Crossings, Hiding in Plain Sight|Stephanie DeMarco|September 15, 2020|Quanta Magazine
A triangle with sides of all different lengths is “scalene,” or “unequal.”
Why Mathematicians Should Stop Naming Things After Each Other - Issue 89: The Dark Side|Laura Ball|September 2, 2020|Nautilus
There is the classic triangle, a sturdy square, and you may even see some rectangular shapes if you are dealing with a nice flatbread.
Pizza cutters that will get you the slice of your dreams|PopSci Commerce Team|September 2, 2020|Popular Science
For the four Platonic solids built out of squares or equilateral triangles — the cube, tetrahedron, octahedron and icosahedron — mathematicians recently figured out that the answer is no.
Mathematicians Report New Discovery About the Dodecahedron|Erica Klarreich|August 31, 2020|Quanta Magazine
Like the triangle and the quadrilateral, the N-gon with the maximum area was a regular N-gon, with equal side lengths and angles.
Can You Cover The Globe?|Zach Wissner-Gross|August 28, 2020|FiveThirtyEight
Each side of the triangle will measure five miles in width, a foot in depth, and nearly 307 miles in length.
The 2013 Novel of the Year Is…|Nathaniel Rich|December 30, 2013|DAILY BEAST
Legambiente has been warning of the equivalent of an environmental apocalypse in the triangle of death for years.
Italy’s Triangle Of Death: Naples Residents Blame Child Cancer Rates On Mob Disposal Of Toxic Chemicals|Barbie Latza Nadeau|November 21, 2013|DAILY BEAST
It was not conceived for what Tel Aviv has become and what the East Jerusalem-Ramallah-Hebron triangle will inevitably become.
How The Israeli-Palestinian Peace Process Became The World's Greatest Bore|Bernard Avishai|April 16, 2013|DAILY BEAST
But she did like Ben Dahan: she said he made her rethink the “triangle.”
Young Israeli Rightists Choose Between Ultra-Nationalists|Elisheva Goldberg|January 2, 2013|DAILY BEAST
The triangle is “like a rubber band wound up in a toy propeller,” Turner says.
Romney’s Intrade Stock: Ready for a Bull Run?|Alex Klein|August 14, 2012|DAILY BEAST
The cups were filled and the three men sat down in a triangle of chairs before any of them spoke again.
Anything You Can Do ...|Gordon Randall Garrett
Large works on geometry are filled with explanations, demonstrations, and applications of the properties of the triangle.
Fundamental Philosophy, Vol. I (of 2)|Jaime Luciano Balmes
In the zenith—that is, above the top of the Pyramid—is a triangle surrounded by a glory; and in the centre is an all-seeing eye.
The Lost Ten Tribes, and 1882|Joseph Wild
Putting the three in a triangle, he balanced the jade box on them.
Huntingtower|John Buchan
I found myself staring fixedly at the old and familiar enough symbol of the rayed eye within the triangle.
A Woman Named Smith|Marie Conway Oemler
British Dictionary definitions for triangle
triangle
/ (ˈtraɪˌæŋɡəl) /
noun
geometrya three-sided polygon that can be classified by angle, as in an acute triangle, or by side, as in an equilateral triangle. Sum of interior angles: 180°; area: 1/2 base × height
any object shaped like a triangle
any situation involving three parties or points of viewSee also eternal triangle
musica percussion instrument consisting of a sonorous metal bar bent into a triangular shape, beaten with a metal stick
a group of three
Derived forms of triangle
triangled, adjective
Word Origin for triangle
C14: from Latin triangulum (noun), from triangulus (adjective), from tri- + angulus corner