In the figure, PQ=QR,angleRPQ=60^(@), an...

In the figure, PQ=QR`,angleRPQ=60^(@), and angleQRS=20^(@)`. Find the measure of `angleQSR`.

A

`20^(@)`

B

`30^(@)`

C

`40^(@)`

D

`50^(@)`

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The correct Answer is:

C

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