3
Solution:
Sum of interior angles = (n - 2) * 180 degrees.
(8 - 2) * 180 = 6 * 180 = 1080 degrees
So, the sum of the measures of the interior angles of an octagon is 1080 degrees.
Added 9/26/2023 12:57:04 PM
This answer has been confirmed as correct and helpful.