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Question
PQ is a tangent drawn from an external point P to a circle with centre O, QOR is the diameter of the circle. If ∠POR = 120°, what is the measure of ∠OPQ?
Solution
Given: PQ is the tangent to the circle with centre O. QOR is the diameter.
In\[∆ POQ\]
\[ \Rightarrow \angle OPQ = 120^o - 90^o = 30^o\]
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