So the equation to find the sum of interior angles is [tex] (n-2)\times 180 [/tex] , with n = number of sides. In this case, this is an octagon (8 sided polygon), so plug in 8 into the equation to solve:
[tex] (8-2)\times 180\\6\times 180\\1080 [/tex]
The sum of the interior angles is 1080°
