ANSWER :
130 degrees
EXPLANATION :
Note that the figure formed by two segments AC and BC is a quadrilateral.
Since the two angles at the point of tangency are 90 degres, the two remaining angles will be supplementary or have a sum of 180 degrees.
That will be :
[tex]\begin{gathered} x+50=180 \\ x=180-50 \\ x=130 \end{gathered}[/tex]
