AB is the chord of a circle with centre O and DOC is a line segment or – McqOptions

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1.	AB is the chord of a circle with centre O and DOC is a line segment originating from a point D on the circle and intersecting AB produced at C such that BC = OD. If BCD = 20 , then AOD=?
A.	20
B.	30
C.	40
D.	60
Answer» D. 60

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