Sum of interiors angles = 1080
But Formular for interior angle is given by
Sum of interiors angles = (n - 2)180
1080 = (n - 2)180
[tex]\begin{gathered} \frac{1080}{180}\text{ = n - 2} \\ 6\text{ = n - 2} \\ 6+\text{ 2 = n} \\ n\text{ = 8} \end{gathered}[/tex]The number of sides of the polygon is = 8