Question

Find x in the following :- ​

Answer 1

Angle ABC = 180 - 120 = 60 degree

= now in triangle ABC all angles sum upto 180 degree

so , 60 + X + X + 30 = 180

= 90 + 2x = 180

= 2x = 90

X = 45 degree

Answer 2

Answer:

x=45°

Step-by-step explanation:

sum of two interior opposite angles are equal to exterior angle.

hence x+x+30°=120°

2x+30°=120°

2x=120°-30°

2x=90°

x=90°/2

x=45°