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Q.

If one of the angle of a quadrilateral is 120°and the remaining three angles are equal, then the measure of each angle is

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a

60°

 

b

40°

 

c

80°

 

d

240°

 

answer is D.

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Detailed Solution

 

One angle is 120

Let remaining 3 equal angles

=x

(Sum of angles in triangle)

=x

3x+120=360

3x=360−120=240

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