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Question

The value of x in the given figure is ______.


  1. 30o
  2. 50o
  3. 40o
  4. 80o


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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