Or this cuboid net could become this shipping container. The net of a triangular prism will be made of three rectangles and two triangles ... A net is a 2D shape that folds to make up a 3D shape.

3D shapes are not flat like 2D shapes. They have height, ... Cuboid. A cuboid has 6 faces ... Triangular prism. Triangular prisms have 5 flat faces. 2 are triangle shaped and 3 are rectangle shaped.