11.
B, D and E are points on a circle centre O.
ABC is a tangent to the circle.
BE is a diameter of the circle.
Angle DBE = 35°.
(a) Find the size of angle ABD.
Give a reason for your answer.
............................ °
(2)
(b) Find the size of angle DEB.
Give a reason for your answer.
............................ °
(2)
(4 marks)