can someone please help me

Answer:
[tex]\theta =135[/tex]
Step-by-step explanation:
Required
Interior of a regular octagon
This is calculated using:
[tex]\theta =\frac{180(n-2)}{n}[/tex]
Where
[tex]n = 8[/tex]
So:
[tex]\theta =\frac{180(8-2)}{8}[/tex]
[tex]\theta =\frac{180*6}{8}[/tex]
[tex]\theta =135[/tex]