Maths-
General
Easy

Question

In the figure, stack C B with bar on top is extended upto D. If Error converting from MathML to accessible text. and angle A B D equals 120 to the power of ring operator end exponent then angle C equals 

  1. 40°    
  2. 200°    
  3. 100°    
  4. none of these    

hintHint:

Exterior angle of a triangle is equal to the sum of its opposite interior angles

The correct answer is: 40°


    A B D space equals C A B plus A C B space left parenthesis e x t e r i o r space a n g l e space o f space a space t r i a n g l e space i s space e q u a l space t o space t h e space s u m space o f space i n t e r i o r space a n g l e s right parenthesis
120 equals 80 plus A C B
A C B space equals 120 minus 80
A C B space equals 40

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