No, octagons just have to be closed shapes with eight sides - the sides do not have to be of equal length.
The only similarities between these shapes are that:These shapes have all congruent interior anglesObviously, the shapes are regular and have equal sides.
There are a few simple shapes with equal sides. The basic shapes are a square, octagon, and an equilateral triangle,
Most shapes do not have equal sides. In nature, shapes with equal sides are the exception rather than the rule.
Any regular shapes have equal sides, including squares and equilateral triangles. Irregular shapes can also have equal sides, but not equal angles.
Any shapes that have seven sides.
A Square
Names for shapes that have equal sides are called EQUILATERAL.
The two quadrilaterals with equal sides are the rhombus and square.
rectangle
Square .
2d shapes that do not have equal sides do not usually have special names.