Answer:
X = 68
Explanation:
This is because u have to do the math - LOL
1. What do you have
So
 - an isosceles has 2 same sides. The pic shows an isosceles triangle
 - 2 sides are the same which is 4
 - 1 side is different and is 1.5
2. Steps to solve
Same length = Same angles
So
 - 4 = 4
 - 56 = 56
3. Finding the angle.
Total angle - angle 1 - angle 2 = angle 3 or ?
 - Total angle = 180
 - Angle 1 = 56
 - Angle 2 = 56
 - Angle 3 = ?
180 - 56 - 56 = 68
Hope this helped,
Kavitha