8 sided shapes
An eight-sided three-dimensional shape is called an octohedron.
yes Yes octagons are 8 sided polygons
All eight sided polygons are known as "octagons". Octagons that have all side lengths the same are known as "regular octagons".
Parallelograms have only four sides. Polygons with eight sides are octagons.
multi sided shapes are called polygons
The answer could depend on the way in which the shapes are connected but I doubt that it has any specific name.
Octagons
Equal sided = equilateral.
An eight sided figure is called an octagon.
An eight sided polygon is called an octagon.
Heptagon.