A rectangular prism is a three-dimensional shape with six faces, all of which are rectangles. It has twelve edges and eight vertices. The length, width, and height of a rectangular prism can vary, but the opposite faces are always equal in size. Common examples of rectangular prisms include boxes, bricks, and books. To find the volume of a rectangular prism, you multiply its length, width, and height together. The formula is Volume = Length × Width × Height. The surface area can also be calculated by adding the areas of all six faces, which helps in understanding how much material is needed to cover the shape.