Triangle

/ˈtraɪæŋɡl/

Meaning & Definition

noun
A polygon with three edges and three vertices.
The architect designed a building in the shape of a triangle.
A geometric figure that has three sides and three angles.
In mathematics, the area of a triangle can be calculated using the formula A = 1/2 * base * height.
A shape formed by connecting three points in a plane.
The traffic sign was shaped like a triangle to indicate a yield.
A musical instrument consisting of a metal bar bent in the shape of a triangle, which is struck with a stick to produce a ringing sound.
The percussionist added a triangle to the orchestra to enhance the rhythm.
A situation involving three parties or actors.
The business deal turned into a triangle of negotiations between the supplier, the distributor, and the retailer.

Etymology

From Middle English triangul, from Old French triangule, from Latin triangulum, from tri- 'three' + angulus 'angle'.

Common Phrases and Expressions

love triangle
A romantic relationship involving three people.
triangle offense
A basketball offensive strategy that uses three players to create spacing and options.
triangle trade
An historic trade route between three ports or regions.

Related Words

trigonometry
The branch of mathematics dealing with the relationships between the angles and sides of triangles.
triangular
Having three angles or sides.
triangulate
To determine the location of a point by forming triangles to it from known points.

Slang Meanings

Refers to a complex situation involving three people, often in relationships.
They've got a bit of a triangle going on with their dating life.
To form a trifecta or a quick decision among three options.
Let's triangle this issue and figure it out.