Chapter 0.8, Problem 5E

To determine

To calculate: The area of the square with side length 9 feet.

Answer to Problem 5E

The area of the square is ${\text{81 feet}}^{\text{2}}$ .

Explanation of Solution

Given information:

A square with side length of 9 feet.

Formula used:

Area $\left(A\right)$ of square is square of its side. Let side of the square be of length $\left(l\right)$ . It is mathematically denoted by $A=l^2$ .

Calculation:

Consider the provided statement a square with side length 9 feet.

Recall that area $\left(A\right)$ of square is square of its side. Let side of the square be of length $\left(l\right)$ . It is mathematically denoted by $A=l^2$ .

Apply it,

  $\begin{array}{c}A=l^2\\ ={\left(\text{9feet}\right)}^2\\ ={\text{81 feet}}^{\text{2}}\end{array}$

Thus, the area of the square is ${\text{81 feet}}^{\text{2}}$ .