## Thinking Mathematically (6th Edition)

$s^{2}$
The area, A, of a square with one side measuring s linear units is given by the formula $s^{2}$. This makes sense, for we can find the area of a rectangle by multiplying the length of each side. Thus, the area of a square, which is a rectangle, is $s\times s$, which is equal to $s^2$.