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right triangle

noun
🔊/ˌraɪt ˈtraɪæŋɡl/
🔊/ˌraɪt ˈtraɪæŋɡl/
 (North American English)
(also right-angled triangle especially in British English)
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  1. a flat shape with three straight sides and one right angleTopics Colours and Shapesc2