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Question

In fig., in ∆ABC, AB = AC. The value of x is:


A

120o

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B

130o

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C

100o

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D

80o

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Solution

The correct option is B

130o


Here, ∠B + ∠C = 180o - 80o = 100o.

But, ∠B = ∠C therefore ∠C = 50o.

So, x = 180o - 50o = 130o.


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