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triangle

three-sided polygon / percussion instrument / warning sign
Noun
pl: triangles

The term primarily evokes the geometric concept of three-sidedness, carrying a sense of stability and structural rigidity. In mathematical contexts, it is the simplest possible polygon, serving as a foundational building block for more complex shapes and trigonometry. When referring to the musical instrument, the word shifts from a conceptual shape to a physical object characterized by a high-pitched, piercing metallic ring. In safety contexts, such as traffic warnings, the shape is used specifically because its distinct silhouette is easily recognizable from a distance.

Meanings

Noun

A plane figure with three straight sides and three angles.

"The children drew a large red triangle on the chalkboard."

Noun

A musical instrument consisting of a steel rod bent into a triangular shape, played by striking it with a small metal beater.

"The orchestral piece concludes with a subtle chime from the triangle."

Noun

A triangular-shaped piece of equipment, such as a traffic warning sign or a specific type of tool.

"The driver placed a reflective triangle on the road to warn other motorists of the breakdown."

Last Updated: June 14, 2026Report an Error