Question

Look at the figure below. 8 8 4 4 Which expression can be evaluated to find the area of this figure?

Answer 1

`8^2-4^2`

Explanation

The figure consists of a square with sides of 8 units from which a square of sides of 4 units has been subtracted.

The area of a square is calculated as follows:

`A=a^2`

where a is the length of each side.

Substituting a = 8, the area of the bigger square is:

`A_1=8^2`

Substituting a = 4, the area of the smaller square is:

`A_2=4^2`

Finally, the area of the figure is:

`A_1-A_2=8^2-4^2`