It is an irregular shape or polygon that doesn't have all sides equal
This shape is called an icosikaitera. All of the sides of the icosikaitera are all of the same equal length.
A shape with eight sides is always an octagon. If all angles and sides are equal, it is called a regular octagon.
A shape where all the sides are equal and all the angles are equal. If all sides are equal but angles or not, it is equilateral. If it is vice versa, it is equiangular.
A square is a four-sided shape with all sides equal and all angles equal.
That depends on what you mean by "diamond shape." In a general shape, no, the sides need not be exact. If the shape is distinctly called a "rhombus," then mathematically speaking, yes, all sides must be equal, per the definition of a rhombus.
Square. By definition, its sides must all be equal.
As long as the angles are all equal as well then it is a regular shape.
A shape with six sides is a hexagon. A hexagon with all sides and angles equal is a regular hexagon.
A shape with 100 sides is called a hecatontagon. The prefix "hecto-" means 100 in Greek, so a hecatontagon is a polygon with 100 sides. It is a regular polygon, meaning all its sides are of equal length and all its angles are equal.
all the sides of the shape are equal (:
When all its sides and angles are equal.