This is the basic and conceptual question from Chapter name- circles
Topic – Angle properties of circles
Chapter number- 15
In the figure given below, O is the centre of the circle. ∠AOE =150°, ∠DAO = 51°. We havr to calculate the sizes of ∠BEC and ∠EBC.
ICSE Avichal publication
Understanding ICSE Mathematics
Question 4(b)
Solution