Question

In the following figure, O is the centre of the circle. Find the value of a, b, c and d.

Answer 1

Here, ∠BAD = 90° (Angle in a semicircle)

 ∴ ∠BDA = 90° – 35° = 55°

Again, a = ∠ACB = ∠BDA = 55° 

(Angle subtended by the same chord on the circle are equal)