a quadrilateral
A triangle as no other 2d shape can have 3 sides.
A 2D shape with 9 sides is called a Nonagon.
No, a rhombus is a 2D shape. It is a parallelogram in which all sides are of equal length.
An octagon
rhombus
It could be a quadrilateral or a parallelogram.
hexagon?
a quadrilateral
A triangle as no other 2d shape can have 3 sides.
A 2D shape with 9 sides is called a Nonagon.
The shape of 2D is a flat surface.
Any 4 sided 2D shape
No. A 2d shape is a plane area, which may be regarded as a face, which is bounded by a side or sides.
2d shapes that do not have equal sides do not usually have special names.
A 2D shape with forty sides is known as a tentracontagon.
Such a 2D shape is a hexagon, a six sided figure.