A rectangular prism is a three-dimensional shape with six rectangular faces. It has length, width, and height, making it a type of cuboid. Each pair of opposite faces is equal in size, and the angles between the faces are right angles. The volume of a rectangular prism can be calculated by multiplying its length, width, and height together. The formula is Volume = Length × Width × Height. Rectangular prisms are commonly found in everyday objects, such as boxes, books, and buildings, making them an important shape in both mathematics and real life.