Regular
A 2d nine sided shape is called a nonagon.
It depends on the shape, whether or not it is regular, etc.
A 2D sphere is a circle.
A 2D shape with 9 sides is called a Nonagon.
Regular
10 sided 2D shape is called a decagon 20 sided 2D shape is called a icosagon 30 sided 2D shape is a swimming pool 40 sided 2D shape is unknown 50 sided 2D shape is unknown 60 sided 2d shape is unknown 70 sided 2d shape is unknown 80 sided 2d shape is unknown 90 sided 2d shape is unknown 100 sided 2d shape is unknown 110 sided 2d shape is unknown 111 sided 2d shape is unknown 120 sided 2d shape is unknown 130 sided 2d shape is unknown
A 2d nine sided shape is called a nonagon.
It depends on the shape, whether or not it is regular, etc.
A 2D sphere is a circle.
A circle.
A 2D shape with forty sides is known as a tentracontagon.
A 2D shape with 9 sides is called a Nonagon.
A regular shape. ( square -regular rectange-, regular pentagon, regular hexagon, equilateral triangle etc. etc.)
A 2D 12 sided shape is called a DodecagonAnd it's called a Dodecahedron if it's 3D.
a regular hexagon
2D shape