#### Question

Given O is the centre of the circle and ∠AOB = 70°. Calculate the value of:

(i) ∠OCA .

(ii) ∠OCA .

#### Solution

Here, ∠AOB= 2∠ACB

(Angle at the center is double the angle at the circumference by the same chord)

⇒ ∠ACB =`70/2` =35°

Now, OC = OA (radii of same circle)

⇒ ∠OCA = ∠OAC =35°

Is there an error in this question or solution?

Solution Given O is the Centre of the Circle and ∠Aob = 70°. Calculate the Value Of: (I) ∠Oca . (Ii) ∠Oca . Concept: Chord Properties - Chords Equidistant from the Center Are Equal (Without Proof).