If it is 3 dimensional it is an icosahedron If it is 2 dimensional it is an icosagon
A five sided 2 dimensional object is called a pentagon.
A nine-sided object is known as a nonagon.
Icosahedron.
Icosagon
If it is 3 dimensional it is an icosahedron If it is 2 dimensional it is an icosagon
A five sided 2 dimensional object is called a pentagon.
If it's a flat figure (2 dimensional), it's a heptagon.If it's a solid object (3 dimensional), it's a heptahedron.Hepta is the Greek for seven
A two-dimensional shape with twenty sides is an icosagon. A three-dimensional object with twenty sides is an icosahedron.
A 5-sided 2-dimensional figure is a pentagon and a 5-sided 3-dimensional shape is a pentahedron.
A number can be used as a prefix. A number + gon describes a two dimensional object. A number + hedron describes a three dimensional object.
Two-dimensional: Pentagon Three-dimensional: Pentahedron
An octagon is an 8 sided 2 dimensional shape. A cylinder with the base of a hexagon (6 sided shape) would be an 8 sided 3 dimensional shape.
A nine-sided object is known as a nonagon.
Decagon.
Icosahedron.
Icosagon