Answer:
x° = 50°
Step-by-step explanation:
Since all angels on a triangle add up to 180°, we can start from there. We also can see since both angles have the exact same measurements, angle x and the unnamed angle must measure to the same degrees. We can now do 180° - 80° = 100° That leaves the two mystery angles at 100°/2 = 50°.
Therefore, x° = 50°.
