From the properties of the circle we know that the angle between the two points given (that is not) is double the angle of 65°, therefore this angle is equal to 130°.
Now, since the line in the middle is a diameter the total arc is equal to 180°, this means that x is equal to 180° minus 130°, that is:
[tex]x=180-130=50[/tex]
Therefore, x=50
