3-d shapes are not made from 2-d shapes. 3-d shapes may have projections onto a plane that are 2-d.
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Polygons are 2d shapes whereas polyhedrons are 3d shapes
The special features of 3D shapes are they all are 3D which means they are fat but 2D shapes are flat they can not stand up.
2d shapes only have length and width, while 3d shapes have length, width and depth.
No because 2d shapes are plane such as polygons but example of 3d shapes are: pyramid, cone, cuboid, cylinder, sphere ... etc
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