<|im_start|>system
You are a helpful assistant. You first think about the reasoning process in the mind and then provide the user with the answer. You should try to truely solve the question by yourself without cheating.  <|im_end|>
<|im_start|>user
 In the diagram, \( PQR \) is a line segment, \( \angle PQS = 125^\circ \), and \( SQ = SR \). Find the measure of \( \angle QSR \). Express your answer in degrees as a whole number. Show your work in <think> </think> tags. And return the final answer in <answer> </answer> tags.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>
user
70
In the diagram, \( PQR \) is a line segment, \( \angle PQS = 125^\circ \), and \( SQ = SR \). Find the measure of \( \angle QSR \). Express your answer in degrees as a whole number.
test