( right triangles)
A right triangle has one angle that is a right angle. ( AM; in BRIT, use right-angled triangle )
N-COUNT
( right triangles)
A right triangle has one angle that is a right angle. ( AM; in BRIT, use right-angled triangle )
N-COUNT
Collins COBUILD Advanced Learner's English Dictionary. Английский словарь Коллинз COBUILD для изучающих язык на продвинутом уровне. 2006