How to Say "Triangle" in Spanish

triángulo

/ˈtɾjanɡulo/masculine

The Spanish word for triangle is triángulo.

triángulo is a masculine noun used to refer to a polygon.

Meaning: polygon (noun)

Which one should you use?

You may encounter triángulito, which is an informal diminutive form of triángulo used to add a friendly or affectionate touch.

The plural form of triángulo is triángulos.

/ˈtɾjanɡulo/

The word for a 'right triangle' in Spanish is triángulo rectángulo, where 'rectángulo' refers to the 'right' or 'straight' angle, not the shape 'rectangle'.
In Spanish music, a triángulo is a common percussion instrument used in folk genres like pasodoble and mariachi.
In Spanish traffic laws, a triángulo de preseñalización is the emergency warning triangle placed behind a broken-down car.

Esto es un triángulo.
This is a triangle.
This sentence is useful for identifying a single triángulo.
Tatoeba #2311717 by marcelostockle, translation #2294789 by slavlangs
¿Qué es un triángulo isósceles?
What's an isosceles triangle?
This sentence is useful for asking about a specific type of triángulo.
Tatoeba #9173353 by arh, translation #9176579 by DJ_Saidez
El Triángulo de las Bermudas es una farsa.
The Bermuda Triangle is a sham.
This sentence is useful for discussing the Bermuda Triangle using triángulo.
Tatoeba #1192321 by marcelostockle, translation #1192323 by marcelostockle
El triángulo es una figura geométrica con tres lados y tres ángulos
The triangle is a geometric figure with three sides and three angles.
¡Mira ese triángulito de papel que me hiciste! ¡Es tan bonito!
Look at that little paper triangle you made for me! It's so cute!
14 more sentences on Tatoeba

María and Alejandro are working on a geometry project.

Sources

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