If PST is a straight line and PQ = QS = SR in the diagram, find y. .... Question 21602

If PST is a straight line and PQ = QS = SR in the diagram, find y.

24^o

48^o

72^o

84^o

Correct answer is A

< PSQ = < SQR = < SRQ = 24^o

< QSR = 180^o - 48^o = 132^o

< PSQ + < QSR + y + 180 (angle on a straight lines)

24 + 132 + y = 180^o = 156^o + y = 180

y = 180^o - 156^o

= 24^o

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