PA and PB are two tangents to a circle with centre O, from a point P outside the circle. A and B are points on the circle. If ∠APB = 70°, then ∠OAB is equal to∶

PA and PB are two tangents to a circle with centre O, from a point P o

1.	PA and PB are two tangents to a circle with centre O, from a point P outside the circle. A and B are points on the circle. If ∠APB = 70°, then ∠OAB is equal to∶
A.	35°
B.	50°
C.	25°
D.	20°
Answer» B. 50°

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PA and PB are two tangents to a circle with centre O, from a point P outside the circle. A and B are points on the circle. If ∠APB = 70°, then ∠OAB is equal to∶

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