LEARNit Dictionary
right-angled triangle
noun
/ˌraɪt æŋɡld ˈtraɪæŋɡl/
UK
/ˌraɪt æŋɡld ˈtraɪæŋɡl/
US
1
a flat shape with three straight sides and one right angle
مثلث قائمالزاویه, مثلث راستگوشه