Some 3D shapes, like cubes and pyramids, can be opened or unfolded along their edges to create a flat shape. The unfolded shape is called the net of the solid. Here are some 3D shapes and their nets.

What are 3D shapes? A three-dimensional (3D) shape is a solid shape. 3D shapes have three dimensions - length, width and depth. Look at the shapes of the faces to help recognise these 3D shapes ...

How is it different from the features of 3D shapes (solids)? Some examples of solids that incorporate 2D shapes are mentioned in this video by Sanchit — for example, a cube has six square faces.

In a blog post and papers, Facebook highlights a pair of AI models that can convert 2D objects into 3D shapes with high accuracy.

A huge 3D printer can print architectural objects using ordinary sand and an inorganic binder.