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Right Rectangular Prism
A right rectangular prism is a threedimensional solid shape with 6 faces, 12 edges, and 8 vertices. It is also called a cuboid. The six faces of a right rectangular prism are rectangular in shape. Some examples of a right rectangular prism are books, aquarium, bricks. Similar to other twodimensional and threedimensional shapes, the right rectangular prism also has a surface area.
1.  Right Rectangular Prism Definition 
2.  Formulas of a Right Rectangular Prism 
3.  Rectangular Prism Net 
4.  FAQs on Right Rectangular Prism 
Right Rectangular Prism Definition
A right rectangular prism is a threedimensional shape with six faces (with all the 6 faces being rectangular in shape), 12 edges and 8 vertices. All the faces of the prism are rectangles. All the angles formed at the vertices are of 90° or right angles.
Properties of a Right Rectangular Prism
It is very easy to identify a right rectangular prism if we know its basic properties. Listed below are its properties.
 The angles between the base and the sides are right angles.
 All its faces are rectangles.
 Each corner of the prism represents a right angle.
 Each base and top of the prism are congruent.
Formulas of a Right Rectangular Prism
To find the surface area, volume, and length of the diagonal of a right rectangular prism, it is easy if we apply some formulae to make our calculations easier. Let us learn about each of the formulas related to the right rectangular prism in this section.
Surface Area of a Right Rectangular Prism
Surface area is the space occupied by the outer surface of any solid shape. The surface area of a right rectangular prism is the space occupied by all the faces of the right rectangular prism.
Surface area of a right rectangular prism = lw+lw+wh+wh+lh+lh, which is equal to 2(lw+wh+lh) square units.
Surface Area = 2(lw+wh+lh) square units.
Volume of Right Rectangular Prism
Volume is the space occupied by a closed surface of a solid shape. Volume of a right rectangular prism can be defined as the product of the area of one face multiplied by its height.
The volume of a right rectangular prism (V) for a length (l), height (h), and width (w) is given by,
Volume = (l × w × h) cubic units.
Diagonal of a Right Rectangular Prism
A diagonal is a line that joins two opposite corners of a shape that has straight sides. The diagonal of a right rectangular prism is the square root of the sum of the squares of the length, width, and height.
The diagonal of a right rectangular prism of length (l), width (w), and height (h) is given by,
Diagonal = \(\sqrt{l^{2}+w^{2}+h^{2}}\)
Important Notes
 A rectangular prism has six faces  the base, the top, and the four sides.
 The base and top always have the same area. The pairs of opposite sides have the same area as well.
 The volume of Rectangular Prism: V = lwh
 Surface Area of Rectangular Prism: S = 2(lw + lh + wh)
 In a right rectangular prism, edges = 12, faces = 6, vertices = 8
 When all sides of a right rectangular prism are equal, it is called a cube. Its surface area is 6a2 and volume is a3.
Challenging Questions
 Is a cube a rectangular prism?
 Can you determine the volume of a rectangular prism when the area of its base and height are given but the length and width are not given as separate measurements?
Rectangular Prism Net
A net is defined as a model of a twodimensional shape that can be folded and made into a threedimensional shape. The net of any geometrical threedimensional shape is obtained by unfolding it along its edges and faces. The net of the right rectangular prism is equal to its surface area. The image given below shows the net of a rectangular prism. We can clearly observe that it is made up of rectangles. By calculating the area of each rectangle, and adding them up we can find the net or the surface area of the right rectangular prism.
Topics Related to Right Rectangular Prism
Check out these interesting articles to know more about right rectangular prism.
Solved Examples

Example 1: Emily needs to buy some cardboard to build a box without a lid. She wants the box to measure 7 units long, 5 units wide, and 9 units high. How much cardboard should she buy?
Solution:
The dimensions of the box are as follows: Length l = 7 units Width w = 5 units Height h = 9 units
We will determine the surface area of the open box, that is, without a lid.
The surface area of the open box is: lw+2wh+2lh = 7 × 5 + 2 × 5 × 9 + 2 × 7 × 9
= 35+90+126
= 251 square units
Therefore, Emily should buy 251 square units of cardboard. 
Example 2:
Identify the right rectangular prisms from the following.
Solution: For an object to be a right rectangular prism, it should have all six faces as rectangles, the opposite faces should be equal and the crosssection along the length is the same. Since all the above conditions are satisfied, we can say that all three are similar to a right rectangular prism. 
Example 3: Kevin wants to determine the height of a rectangular prism with base area 10 units^{2} and volume 40 units^{3}.
Solution:The volume of a rectangular prism is 40 cubic units. The base area is given by l×b = 10 square units. The height of the prism is calculated as follows.
Volume = 40 cubic units
So, lbh = 40
lb × h = 40
10 × h = 40
h = 4 units
Therefore, height of the prism is 4units. 
Example 4: Tim wanted to add soil to his gardening bed which is in the shape of a rectangular prism and has the following dimensions: length = 8 units, width = 4 units, and height = 1 units. What is the maximum amount of planting soil that can be used to fill the gardening bed?
Solution:Tim's gardening bed resembles that of a rectangular prism having the following dimensions: Length, l = 8 units Width, w = 4 units and Height, h = 1 unit.
The maximum amount of planting soil that can be used to fill the bed is the volume of the bed which is equal to = (l × w × h) cubic units. That is, 8 x 4 x 1 = 32 cubic units. Therefore, 32 cubic units of the soil can be used to fill the gardening bed.
FAQs on Right Rectangular Prism
What is a Right Rectangular Prism?
A right rectangular prism is a threedimensional object that has 6 faces, 12 edges, and 8 vertices. It is also known as a cuboid.
What is the Formula for Finding the Volume of a Right Rectangular Prism?
The formula to find the volume of a right rectangular prism is given as, Volume of a right rectangular prism = (length × width × height) cubic units.
How to Find Surface Area of Right Rectangular Prism?
To find the surface area of a right rectangular prism, we add the areas of every face. The formula to find the surface area is 2(lw + wh + lh) square units.
What are Some RealLife Examples of Right Rectangular Prism?
Books, bricks, laptops. aquarium are some reallife examples of a right rectangular prism.
Which Two Dimensional Shape Does Each Face of a Right Rectangular Prism Resemble?
All the faces of a right rectangular prism are rectangular in shape.
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