PA and PB are tangents to a circle with centre O, from a point P outside the circle, and A and B are points on the circle. If ∠APB = 40°, then ∠OAB is equal to:

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

1.	PA and PB are tangents to a circle with centre O, from a point P outside the circle, and A and B are points on the circle. If ∠APB = 40°, then ∠OAB is equal to:
A.	25°
B.	40°
C.	20°
D.	50°
Answer» D. 50°

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PA and PB are tangents to a circle with centre O, from a point P outside the circle, and A and B are points on the circle. If ∠APB = 40°, then ∠OAB is equal to:

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