The shape of a cone perhaps
Polygons are 2d shapes whereas polyhedrons are 3d shapes
A 3d shape is a forms of shapes that have length , width and death of thickness.
A sphere or a globe is a 3D circular shape
Some 3D shapes will tessellate as for example a brick wall
The shape of a cone perhaps
Many 3d shapes have a corner.
Polygons are 2d shapes whereas polyhedrons are 3d shapes
A 3d shape is a shape with 3 dimensions. they are height width and length.
A 3d shape is a forms of shapes that have length , width and death of thickness.
A sphere or a globe is a 3D circular shape
Some 3D shapes will tessellate as for example a brick wall
2d shapes are shapes that can only be seen from the front unlike 3d shapes and they are flat
they are: ---sided pyramids and triangular prisms and 20 sided 3d shapes
That will depend on what they are but in general 3D shapes have surface area and volume whereas 2D shapes have only surface area.
It is important to learn and remember the name of 3D shapes. A 19 faced 3d shape is called a nonadecahedron.
The difference between 2d and 3d shapes is that, a 2d shape is flat, has no volume and depth and cannot be handled while a 3d shape can be held, has depth, volume and can hold things inside it. These are the dimensional shapes which are mostly used in geometry.