In the given figure, O is the centre of a circle and BD is a diameter. AB and AC are tangents
touching the circle at B & C respectively. If angleBAC = 70° then angleOBC
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Answer:35°
Step-by-step explanation:
AB = AC ... by theorem
Therefore angle ABC = angle ACB =55°
Angle DBA =90° .... by theorem
Angle DBC =90°-55°= 35°
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