An irregular shape!
A shape that does not have equal sides is called an irregular shape.
a quadrilateral
trapezoid
A shape with 9 unequal sides would be called an irregular nonagon or an irregular enneagon.
It is called an octagon and an irregular octagon can take any shape.
An irregular shape can be called a blob.
Irregular
An irregular hexagon.
It is an IRREGULAR shape.
They are called 'irregular galaxies"
Not surprisingly, it would be called an irregular galaxy.
A shape that does not have equal sides is called an irregular shape.
There is no formula. That's why it's called irregular!
An octagon. Or more specifically, an irregular octagon.
a quadrilateral
an irregular polygon
trapezoid