Tibbetts, R. Description This wooden model shows a triangular pyramid with three small triangular prisms emerging from one side. These form, together with the pyramid itself, three stacked triangular ...

prisms, which are 3D shapes with a constant cross-section pyramids, which are 3D shapes with a polygonal base connected to an apex ... 3D shapes that are not polyhedra include: cylinders cones spheres ...

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.

Thiscut and folded tan paper model has a triangular prism for a base and two smaller triangular prisms stacked atop it. It may represent an inscribed pyramid, compared to the circumscribed pyramid ...