A pentagon.
A pentagon.
Any pentagon has.
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.
The shape is a regular pentagon.
A 2D shape that has four sides and is thirteen letters long is a quadrilateral.
2d shapes that do not have equal sides do not usually have special names.
A 16 sided 2d shape is called a hexadecagon.
A 2D shape with forty sides is known as a tentracontagon.
Such a 2D shape is a hexagon, a six sided figure.