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English definition of “right-angled triangle”

right-angled triangle

noun [C] uk   /ˌraɪt.æŋ.ɡl̩dˈtraɪ.æŋ.ɡl̩/ UK (US right triangle) us  
a triangle that has one angle of 90°Geometrical shapesSpherical, circular and annular objects
(Definition of right-angled triangle from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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