A prism is a 3-D shape that has a constant cross-section along its length. The volume of a prism is calculated using the following formula where A is the cross section, l is the length and h is the height.
Volume = Ah
Volume = Al
A pyramid is a 3-D shape with a base which is usually a polygon but can also be a shape with curved edges. The it also has faces rising up from the base meet at a common vertex or apex. The most common pyramids are tetrahedron, square based pyramid and cone.
The volume of a pyramid is calculated using the following formula, where A is the base area and h is the height.
Volume of a pyramid = 1/3Ah