The value of x in the triangle is 130°
A triangle is a three sided polygon and can be of different types. The sum of angle of any types of triangle is 180°
This means that if the three sides of a triangle are A, B, C , then the sum of angles are
A + B + C = 180°
The triangle is an isosceles triangle and two sides are equal and two corresponding angles are equal.
The unknown angle x is calculated by
x + 25 + 25 = 180
x + 50 = 180
x = 180 - 50
x = 130°
Therefore the value of x is 130°