1) The diagram below, not drawn to scale, shows a circle, centre O. The line DCE is a tangent to the circle. Angle ACE = 48° and angle OCB = 26°. ‘ Calculate, giving reasons for your answer, the magnitude of angles: a) ABC (2 marks) b) AOC (2 marks) c) BCD (2 marks) d) BAC (2 marks) e) OAC (3 marks)