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Q.

Question Image

What is the value of y?


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a

65∘

b

85∘

c

75∘

d

95∘ 

answer is A.

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Detailed Solution

We have been given,
∠ABC=115∘ Question ImageWe know that,
∠ABC and ∠CBD form a linear pair.
Thus, we can say
∠ABC+∠CBD=180∘ Substituting the given value,
⇒115∘+y∘=180∘ Solving further,
⇒y∘=180∘-115∘ ⇒y∘=65∘ Therefore, the value of y is 65∘.
Hence, option 1 is correct.
 
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