A 2D shape with 9 sides is called a Nonagon.
Octagon
A triangle as no other 2d shape can have 3 sides.
in 2d shapes a quadrilateral
A 2D shape that has four sides and is thirteen letters long is a quadrilateral.
A 2D shape with 9 sides is called a Nonagon.
An Octogon An Octogon regular regular
Square
Tetradecagon.
Octagon
hexagon
It is a Heptagon.
A triangle as no other 2d shape can have 3 sides.
A ten-sided 2D polygon is known as a decagon.
A twenty sided, 2D figure is called an icosagon.
in 2d shapes a quadrilateral
A quadrilateral.