Answer:
[tex]1,080^{\circ}[/tex]
Step-by-step explanation:
The sum of the interior angles of a polygon with [tex]n[/tex] sides is given by [tex](n-2)\cdot 180^{\circ}[/tex].
Substituting [tex]n=8[/tex], we get:
[tex](8-2)180=6\cdot 180=\boxed{1,080^{\circ}}[/tex]
