$\"\"$

The surface area of a three dimensional object is the sum of the areas of the faces.

If $\"\"$ represents the lenght of the side of a cube.

Write a formula for surface area of the cube.

A cube has $\"\"$ faces.

Surface area of each face is $\"\"$ .

Therefore as a cube has $\"\"$ faces, the surface area of the cube is $\"\"$ .

$\"\"$

The formula for surface area of the cube is $\"\"$ .