A prism is formed when the joining edges and faces are at a perpendicular angle to the base faces. This only applies if the faces that are joined are rectangular - this is called a right prism. If it is the case that the faces that join are not perpendicular to the base faces it is called an oblique prism.

Pyramids are a different shape and are with a three-dimensional polyhedron face where the bases are triangular and meet at one point, called the apex. The base of a pyramid can be any polygon though it is usually a square or a triangle touching three or four non-base faces.

A prism has many sides whereas the pyramid has five sides including a flat shape underneath.

A prism has three rectangular sides and 2 of these 3 rectangular surfaces are identical in size. Any rectangular side can work as an end.

A pyramid has a base and a connecting point, while a prism has a base, together with a translated copy of it.

The sides or faces formed in a pyramid are always triangles, while in a prism, they normally form a parallelogram.

A pyramid is often regarded as a solid building, while a prism is referred to something that is transparent, and can refract, reflect or split light.

This is a good visual representation of the differences visually www.slideshare.net/guest11dd19/prisms-pyramids

Pyramids are a different shape and are with a three-dimensional polyhedron face where the bases are triangular and meet at one point, called the apex. The base of a pyramid can be any polygon though it is usually a square or a triangle touching three or four non-base faces.

A prism has many sides whereas the pyramid has five sides including a flat shape underneath.

A prism has three rectangular sides and 2 of these 3 rectangular surfaces are identical in size. Any rectangular side can work as an end.

A pyramid has a base and a connecting point, while a prism has a base, together with a translated copy of it.

The sides or faces formed in a pyramid are always triangles, while in a prism, they normally form a parallelogram.

A pyramid is often regarded as a solid building, while a prism is referred to something that is transparent, and can refract, reflect or split light.

This is a good visual representation of the differences visually www.slideshare.net/guest11dd19/prisms-pyramids