Which of the following relation between x and y is correct?

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MCQs on triangles basics, triangle angle sum property, triangle congruence and its criteria, triangle properties and inequalities.


Which of the following relation between x and y is correct?<br><img src='https://www.fatskills.com/images2/mathematics-questions-answers-angle-sum-property-triangle-q2.png' alt='' width='287' height='135' class='308605' />