Question

A side of the triangle below has been extended to form an exterior angle of 162º. Findthe value of x.

Answer 1

Notice that the exterior angle of 162 degrees and angle x are supplementary, therefore:

`x^(\circ)+162^(\circ)=180^(\circ)`

solving for x we get:

`\begin{gathered} x^(\circ)=(180-162)^(\circ) \\ x^(\circ)=18^(\circ) \end{gathered}`