A hexahedron is the name for a 6 sided 3D shape.
A nonagon is a 2D shape and there is not a 3D equivalent shape.
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Tetrahedron
Dodecahedron
A regular hexahedron
A hexahedron is the name for a 6 sided 3D shape.
A nonagon is a 2D shape and there is not a 3D equivalent shape.
the name of a 20 sided 3d shape is called a icosahedron
A cube is a 3D shape with a top and bottom.
Ellipsoid. (An oval is a 2-d shape, NOT 3-d).
base
A solid
An octahedron
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It is important to learn and remember the name of 3D shapes. A 19 faced 3d shape is called a nonadecahedron.
The simplest such shape is PYRAMID.