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Right-angled triangle
/ɹˈaɪtˈaŋɡəld tɹˈaɪaŋɡəl/
/ɹˈaɪtˈæŋɡəld tɹˈaɪæŋɡəl/
Right-angled triangle
[NOUN]1
(geometry) a flat shape consisting of three straight sides and one right angle
synonyms : right triangle
antonyms : oblique triangle