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Given O is the Centre of the Circle and ∠Aob = 70°. Calculate the Value Of: (I) ∠Oca . (Ii) ∠Oca . - ICSE Class 10 - Mathematics

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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).
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