If the length of a chord AB is equal to the radius OA of a circle, the

1.	If the length of a chord AB is equal to the radius OA of a circle, then ∠AOB = ______,
A.	75°
B.	30°
C.	90°
D.	60°
Answer» E.

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If the length of a chord AB is equal to the radius OA of a circle, then ∠AOB = ______,

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