What is a Rectangular Prism?
In geometry, a rectangular prism can be defined as a
3dimensional solid shape which has six faces that are rectangles.
A rectangular prism is also a cuboid.
We can find the shape of a rectangular prism in a truck, a chest of drawers and in an aquarium, around us.
Properties of a Rectangular Prism :
 A rectangular prism has 8 vertices, 12 sides and 6 rectangular faces.
 All the opposite faces of a rectangular prism are equal.
 A rectangular prism has a rectangular cross section.
Rectangular prisms can be of two types, namely right rectangular prism and nonright rectangular prisms.
Surface Area and Volume of a Rectangular Prism:
Letâ€™s consider this rectangular prism with the length, width and height marked.
Since all the faces of a rectangular prism are rectangles and opposite faces are equal, the surface area of a rectangular prism can be calculated using the following formula:
Surface Area = 2 {( width x length ) + ( length x height ) + (width x height )} 
Volume of a rectangular prism is simply obtained by multiplying all three dimensions  length, height and width.
Volume = length x width x height 
Fun Facts
 Rectangular prisms are the most commonly used prisms in real life, especially in packaging, from cereal boxes to cartons and parcels delivered by mail.

Let's sing!
I see a rectangular prism in a red brick.
And, sometimes in books, big, fat and thick.
Also, in a suitcase, and the TV remote I click.
Let's do it!
Ask your child to find and observe things in the shape of rectangular prism such as in a television, a cupboard, a cookie box or a cereal box. Further, you can show and explore how a cereal box is a 3dimensional rectangular prism.
Related math vocabulary