This is the basic and conceptual question from Chapter name- circles

Topic – Angle properties of circles

Chapter number- 15,

In this question we have AP and BP are tangents to the circle with centre O.

Also Given that ∠APB = 60°,

Now we have to calculate. (i) ∠AOB (ii) ∠OAB (iii) ∠ACB.

ICSE Avichal publication

Understanding ICSE Mathematics

Question 27(b)

Solution