A 3D shape with all straight edges and flat faces is a polyhedron. Other 3D shapes ... of a prism are the congruent polygon ‘ends’, plus the rectangles that join them. The number of ...

It details the formulas used to calculate their volumes, emphasizing the relationships between these shapes. For example, the volume of a pyramid is one-third that of a prism with the same base ...

For example, in the prism below, the cross section is a hexagon. This is called a hexagonal prism. Some 3D shapes, like cubes and pyramids, can be opened or unfolded along their edges to create a ...