Question

Is the relationship between the number of sides of a polygon and the interior angle sum of the polygon proportional? Justify your answer in two ways.

Answer 1

Let:

$\begin{gathered} y=kx \\ \text{Where:} \\ k=\text{Constant of proportionality} \end{gathered}$$\begin{gathered} 180=3k \\ k=\frac{180}{3}=60 \end{gathered}$$y=180x-360$