right-angled triangle
noun /ˌraɪt æŋɡld ˈtraɪæŋɡl/
/ˌraɪt æŋɡld ˈtraɪæŋɡl/
(especially British English) (North American English usually right triangle)
- enlarge imagea flat shape with three straight sides and one right angle
直角三角形 Topics Colours and Shapesc2