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Question

If ABC=x+y and PQR=xy are supplementary angles, the value of x is:

A
30o
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B
60o
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C
90o
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D
120o
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Solution

The correct option is C 90o

Since ABC=x+y and PQR=xy are supplementary angles, we have

(x+y)+(xy)=180o
2x=180ox=90o


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