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Maths Exercices

Surface area of a rectangular prism


The surface area of a rectangular prism is is the area of the six rectangles that cover it.
If we break the rectangular prism into its parts we are going to have 2 bases and 4 lateral faces (rectangles) which make up the lateal area.

It is pretty easy to calculate their areas and then add them up.


What is the surface area?

A rectangular prism has 3 pairs of identical faces. Each face is a rectangle.

Find the area of the faces in each pair.

Now add the areas of the 6 faces.

Surface area = 24 + 24 + 54 + 54 + 36 + 36

= 228


The surface area of the rectangular prism is 228 square centimeters


What is the surface area when a=9, b=9 and c=2?