In a circle with centre O, AD is a diameter and AC is a chord. B is a – McqOptions

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1.	In a circle with centre O, AD is a diameter and AC is a chord. B is a point on AC, such that OB = 5 cm and ∠OBA = 60°. If ∠DOC = 60°, then what is the length of BC?
A.	4 cm
B.	5 cm
C.	5√3 cm
D.	3√5 cm
Answer» C. 5√3 cm

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