In the adjoining figure , PQ || RS, find the value of y.
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Answer:
draw a line parallel to PS
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Refers to the attachments
First, We draw a line AB parallel to PQ.
Since, AB ll PQ and QT is a transversal.
Since, AB ll PQ and PQ ll RS , So AB ll RS and RT is a transversal.
Since, AB is a straight line.
QTA+y+RTB=180
70+y+53=180
y+123=180
y=180 - 123
y= 57
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