We found 3 dictionaries that define the word right-angled triangles:

General (3 matching dictionaries)

1. right-angled triangles, right-angled triangles: Collins English Dictionary
2. right-angled triangles: Cambridge Advanced Learner's Dictionary
3. right-angled triangles: Wiktionary

(Note: See right-angled_triangle as well.)

Definitions from Wiktionary (right-angled triangle) ▸ noun:  (geometry) A right triangle. ▸ Also see right-angled_triangle ▸ Words similar to right-angled triangles ▸ Usage examples for right-angled triangles ▸ Idioms related to right-angled triangles ▸ Wikipedia articles (New!) ▸ Words that often appear near right-angled triangles ▸ Rhymes of right-angled triangles ▸ Invented words related to right-angled triangles