Answer:
x = 46
Step-by-step explanation:
Since two sides of the triangle have the same length, we knows it's isosceles. This means we we will have two base angles with the same value, and one vertex angle. Since 88 is the angle in between both legs, we knows 88 is the vertex angle. This means x is one of the base angles.
So 2x + 88 = 180
2x = 92
x = 46
