Question

A side of the triangle below has been extended to form an exterior angle of 157º. Findthe value of x.

Answer 1

The exterior angle of the triangle is the sum of two opposite angles.

$\begin{gathered} 157^{\circ}=48^{\circ}+x \\ x=109^{\circ} \end{gathered}$

Thus, the reequired value of x is 109 degrees.