Question

An isosceles triangle has an angle that measures 120°. What measures are possible for the other two angles? Choose all that apply.

1) 10 Degrees
2) 30 Degrees
3) 120 Degrees
4) 70 Degrees

Answer 1

30 degree

The sum of isosceles triangle is 180 degree. And this triangle 2 sides have to be equal.
So one of our angle is 120 degree. Two angle will be 180-120 = 60 degree

Now one angle 60/2=30