The circumcentre of a triangle ABC is O. If ∠BAC = 70° and ∠BCA – McqOptions

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1.	The circumcentre of a triangle ABC is O. If ∠BAC = 70° and ∠BCA = 80°, then the measure of ∠OAC is equal to:
A.	30°
B.	70°
C.	60°
D.	40°
Answer» D. 40°

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