From the consequence of intersecting secant theorem, we have that
[tex]62^{0\text{ }}=\frac{1}{2}(b+80)[/tex][tex]62^0\text{ x 2 }=\text{ b +}80[/tex][tex]\begin{gathered} 124\text{ = b+80} \\ b\text{ = 124 -80} \\ b=44^0 \end{gathered}[/tex]
Hence, b = 44°
