Question

Please solve this question

Answer 1

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Answer 2

In triangle ABC
angle A + angle B + angle C = 180°
=> 76° + 52° + angle C = 180°
=> angle C = 180° - 128°
=> angle C = 52°

angle OBC = 1/2 angle B
=> angle OBC = 26°

angle OCB = 1/2 angle C
=> OCB = 26°

In triangle OBC,
angle O + angle OCB + angle OBC = 180°
=> Y + 26° + 26° = 180°
=> y + 52° = 180°
=> y = 180° - 52°
=> y = 128°

Hope that it will help you.