Answer:
x = 65
Explanation:
The triangle has 2 congruent sides and is therefore isosceles.
The base angles are congruent, both 25°
Subtract the sum of the base angles from 180° for vertex angle
vertex angle = 180° - (25 + 25)° = 180° - 50° = 130°
Hence x = 130° ÷ 2 = 65