If it is a regular octagon it's 1080 degrees. You can use this formula: S = (n-2) x 180
Every pentagon, regular or not, has five interior angles and five exterior angles.
It has 6 angles, none of which are right angles.
I guess 16 angles.
10
It is: 135 degrees
The octagon has 8 angles in every grade.
If it is a regular octagon it's 1080 degrees. You can use this formula: S = (n-2) x 180
8
Every pentagon, regular or not, has five interior angles and five exterior angles.
There are 5 angles.
8 angles
It has 6 angles, none of which are right angles.
A regular hexagon has six equal internal angles of 120 degrees. None of them are right-angles !
I guess 16 angles.
10
2 pairs of equal angles