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 = 40°, then ∠OAB 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 = 40°, then ∠OAB equal to∶
A.	40°
B.	20°
C.	50°
D.	25°
Answer» C. 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 = 40°, then ∠OAB equal to∶

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