Yo sup??
We can solve this question by applying the properties of isosceles triangles
Since the other two sides are equal therefore their angles with the base has to be equal.
Let the angles with the base be x, then
x+x+50=180
(by angle sum property of a triangle)
2x=130
x=65
Verification:
if the sum of all angles comes out to be 180 then our calculation is right.
65+65+50=180
Hence verified
Hope this helps.