Yes:
As the shape is regular all sides are equal in length (and congruent).
An octagon has 8 sides. As this is an even number of sides, the opposite sides are parallel.
No. It is the opposite sides of a regular octagon that are parallel and congruent.
That could be numerous polygons: a square, a regular hexagon, a regular octagon, a regular dodecagon ... Any regular polygon with an even number of sides could be your answer.
No, a regular octagon has 8 congruent sides
8 if it's a regular octagon
There is no particular name. It need not be a regular polygon - for example, consider a stretched hexagon.
No. It is the opposite sides of a regular octagon that are parallel and congruent.
That could be numerous polygons: a square, a regular hexagon, a regular octagon, a regular dodecagon ... Any regular polygon with an even number of sides could be your answer.
No, a regular octagon has 8 congruent sides
A regular octagon has four pairs of parallel lines.
8 if it's a regular octagon
A regular octagon has four pairs of parallel sides.
Any even-sided, regular shape will have opposite sides parallel. A square, hexagon, octagon and decagon are just four examples !
if it has all congruent sides, then it is regular
It depends on the actual shape of that octagon. It CAN have two pairs of parallel sides. A regular octagon has 4 pairs of parallel sides.
If you mean parallel sides then a regular 8 sided octagon has 4 pairs of parallel sides
There is no particular name. It need not be a regular polygon - for example, consider a stretched hexagon.
8