Q11 (a) In the figure (i) given below, O is the centre of the circle. If ∠COD = 40° and ∠CBE = 100°, then find :

(i) ∠ADC
(ii) ∠DAC
(iii) ∠ODA
(iv) ∠OCA.

(b) In the figure (ii) given below, O is the centre of the circle. If ∠BAD = 75° and BC = CD, find :

(i) ∠BOD
(ii) ∠BCD
(iii) ∠BOC
(iv) ∠OBD

Solution

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