Geometryhard · Past Paper
In the figure, O is the center. PA and PB are tangents. If angle AOB = 120 degrees, find angle OAB.
A30 degrees
B60 degrees
C90 degrees
D120 degrees
✓ Correct Answer: A — 30 degrees
Triangle OAB is isosceles (OA=OB). Angle OAB = (180 - 120) / 2 = 30 degrees.
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