right-angled triangle
noun/ˌraɪt æŋɡld ˈtraɪæŋɡl/
/ˌraɪt æŋɡld ˈtraɪæŋɡl/
(especially British English) (North American English usually right triangle)
- a flat shape with three straight sides and one right angleTopics Colours and Shapesc2
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right-angled triangle