It is: 135 degrees
If it is a regular octagon it's 1080 degrees. You can use this formula: S = (n-2) x 180
Interior angles of a regular 18 gon (octdecagon) are 160o.
Only when it is a regular polygon that all interior angles are of equal measure
900
If you mean a regular pentagon then each of its 5 interior angles measures 108 degrees
9
1350
45 degrees/angle for a regular octagon.350/8=45.
Only if the polygon is "regular".
108 degrees
No.
540 degrees