AB is diameter and angle ACD= 55 degrees what is the measurement of angle DOB
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70°
Step-by-step explanation:
Angle ACD and Angle AOB are the angles on circumstance and at center respectively both lie on same arc AD
so AOD= 2× ACD = 2×55° = 110°
angleAOD and BOD angles on straight linea ngle AOD+ angle BOD = 180°So Angle BOD = 180° - 110° = 70°
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