In the given figure, \( \triangle O D C \sim \triangle O B A, \angle B O C=115^{\circ} \) and \(...

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In the given figure, \( \triangle O D C \sim \triangle O B A, \angle B O C=115^{\circ} \) and \( \angle C D O=70^{\circ} \).
Find (i) \( \angle D O C \) (ii) \( \angle D C O \) (iii) \( \angle O A B \)
(iv) \( \angle O B A \).
\( \mathrm{W} \)
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