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+1 vote
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in Mathematics by (15.0k points)
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In the given figure, if lines PQ and RS intersect at point T, such that PRT = 40º, RPT = 95º and TSQ = 75º, find SQT.

1 Answer

+1 vote
by (24.9k points)
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Best answer

Using angle sum property for ΔPRT, we obtain

PRT + RPT + PTR = 180º

40º + 95º + PTR = 180º

PTR = 180º − 135º

PTR = 45º

STQ = PTR = 45º (Vertically opposite angles)

STQ = 45º

By using angle sum property for ΔSTQ, we obtain 

STQ+ SQT + QST = 180º 

45º + SQT + 75º = 180º 

SQT = 180º − 120º

SQT = 60º

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