A 2D shape with 9 sides is called a Nonagon.
A Nonagon
nonagon
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A nonagon is a 2 dimensional shape that has nine sides. A polygon on the other side refers to a plane that is 2D and has three straight sides.
A nonagon is a 2D shape and there is not a 3D equivalent shape.
A nonagon is a 2D shape so you cannot make a 3D nonagon!
A 2d nine sided shape is called a nonagon.
2D - Nonagon 3D - Nonahedron
Any 4 sided 2D shape
a 2d nonagon
A triangle as no other 2d shape can have 3 sides.