What is the surface area formula?

Question

I don’t understand how to do the surface area formula

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Answer 1 · 2018-04-28T12:48:24

See below:

The surface area formula for a cube is:

#6a^2#

#"a = edge"#

Since a cube is made up of #6# squares, you will just be finding the area for the #"six faces"#.

Let's use an example. What is the surface area of a cube with an edge of #4#?

Well, plug that value into the problem and solve:

#6a^2#

#6(4)^2#

#6(16)#

#96# #"un"^2#

So all you have to know is the length of the cube's edge to find its surface area.