Question

What is the surface area of the cube below? 9 9 9

Answer 1

486 units

Explanation:

just took the test on A P E X

Answer 2

`A_s=486\ units^2`

Explanation:

Remember that the sides of a cube always have the same length.

In this case the length of the sides L is:

`L = 9`.

The cubes have 6 faces. Then the surface area of the cube is equal to the area of its 6 faces.

Since all sides of the cube have the same measure, then the area of each face is:

`A = L ^ 2`

Then the area of the 6 faces is:

`A_s = 6L ^ 2`

`A_s = 6 * (9 ^ 2)`

`A_s=486\ units^2`