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Question

In the given figure OA and OB are opposite rays:

If x = 75, then what is the value of y in degrees?


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Solution

Since AOC and BOC form a linear pair.

Therefore, AOC + BOC = 180

⇒ x + y =180 ........ (a)

If x = 75, then from (a) ;

⇒ 75 + y = 180

⇒ y = 105


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