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Question

In the diagram, segment PQ is a tangent to the circle at P and QRS is a straight line. The value of x is
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A
25o
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B
30o
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C
35o
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D
40o
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Solution

The correct option is D 40o
180oQPS=PQS+PSQ
[Exterior angle of a triangle is equal to sum of interior opposite angles]
=350+x
RPQ=PSQ=x0
[Angles in the alternate segment]
TPS+SPR+RPQ=1800
[Linear pair]
35+x+65+x=180
2x=180100
2x=80
x0=400

Hence, option D.

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