Given: A regular octagon
To Determine: The interior sum for the given polygon
Solution
The formula for finding the interior angle sum of a polygon is given as
[tex]\begin{gathered} S_{um\text{ of interior angle of a polygon}}=(n-2)180^0 \\ n=number\text{ of sides of the polygon} \end{gathered}[/tex]
An octagon is a polygon with 8 sides
Substitute the value of n = 8 into the formula
[tex]undefined[/tex]
