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Question

The value of x in the given figure is ______.


A
30o
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B
50o
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C
80o
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D
40o
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Solution

The correct option is B 50o

BAC+BAE=180
(Since both the angles form a linear pair of angles)

BAC+110=180
BAC=70

Now, ABC+BAC=ACD
(Since, exterior angle of a triangle is equal to the sum of its two opposite interior angles)

x+70=120

x=50


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