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Question

In the given figure, Q is the centre of the circle and PM and PN are tangent segments to the circle.
If mMPN=70o, find MQN.
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Solution

Since angle between tangent to a circle and the radius passing through the point of contact is 90o
so PNQ=PMQ=90o,
Now since PNQM is forming a quadrilateral, so sum of its all inernal angle will be 360o
Hence
MQN+PNQ+PMQ+MPN=3600
MQN+90o+90o+70o=3600
MQN=3600250o=110o

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