| Part of speech | common noun |
|---|
| Afrikaans | triangel |
|---|---|
| Catalan | triangle |
| Czech | triangl |
| Danish | triangel |
| Dutch | triangel |
| Esperanto | triangulo |
| Finnish | triangeli; pimpparauta |
| French | triangle |
| German | Triangel |
| Greek | τρίγωνο |
| Hungarian | triangulum; fémháromszög |
| Italian | triangolo |
| Norwegian | triangel |
| Polish | trójkąt |
| Portuguese | triângulo; ferrinhos |
| Russian | треугольник |
| Spanish | triángulo |
| Swedish | triangel |
| Thai | สามเหลี่ยม |
| Turkish | üçgen |