The circumcentre of a triangle abc is o July 8, 2019 16 32 64 128 The circumcentre of a triangle abc is o if angle bac = 85 The circumcentre of a triangle abc is o. prove that ∠abc∠bac = 90o The circumcenter of a triangle abc is o The circumcentre of a triangle abc is o prove that obc bac 90 The circumcenter of an obtuse triangle lies