Question

If a square has a perimeter of 28 inches, what is its area in square inches?

Answer 1

Remember that

The formula to calculate the perimeter of a square is

`P=4*b`

where

b is the length side of the square

we have

P=28 in

substitute in the formula

`\begin{gathered} 28=4*b \\ sol\text{ve for b} \\ b=(28)/(4)=7\text{ in} \end{gathered}`

The area of a square is

`A=b^2`

substitute the value of b

`\begin{gathered} A=7^2 \\ A=49\text{ in}^2 \end{gathered}`

The area is 49 square inches

option C