Given the image, we are asked to find the angle subtended by arc AB. This can be seen below.
Explanation
We will recreate the given image with a slight adjustment.
The angle
[tex]\begin{gathered} \hat{AB}=x \\ Also\text{ }x+10+10=180\text{ \lparen Sum of angles in a triangle\rparen} \\ x+20=180 \\ x=180-20 \\ x=160 \\ \end{gathered}[/tex]
Answer: 160 degrees
