No, they do not.
yes
There are 6 of them.
if it has all congruent sides, then it is regular
If each interior angles is 135 degrees then its 8 sides will be congruent in length
No, a regular octagon has 8 congruent sides
No. It is the opposite sides of a regular octagon that are parallel and congruent.
yes
No, they do not.
8 if it's a regular octagon
Eight
yes
8
Yes, they all are congruent and have 4 lines of symmetry
There are 6 of them.
4
an 8 sided polygon that has congruent angles, but not congruent side lengths