How to Say "triangle" in Spanish
The Spanish word for “triangle” is “triángulo” — A1 level. This is a very common word in everyday Spanish.

Examples
Un triángulo tiene tres lados y tres ángulos.
A triangle has three sides and three angles.
Dibuja un triángulo en el papel.
Draw a triangle on the paper.
La señal de tráfico tiene forma de triángulo.
The traffic sign is shaped like a triangle.
Always Masculine
Even though it ends in 'o', just remember it always takes 'el' or 'un'. It doesn't change if you are talking about big or small shapes.
The Accent Mark
The stress is on the 'an' sound. We put a little mark (á) there to show you should emphasize that part of the word.
Confusing with 'Angle'
Mistake: “El triángulo es de 90 grados.”
Correction: El ángulo es de 90 grados. (Use 'ángulo' for the corner/degree, 'triángulo' for the whole three-sided shape).
Other Meanings of “triángulo”
“triángulo” can also mean:
- the musical percussion instrument(B1)
Related Translations
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