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El perímetro de un cuadrado es de 36 pulgadas. ¿Cuál es su área, en pulgadas cuadradas? Sand

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The formula for the perimeter of square with side a is,


P=4a

Determine the side of square for P = 36.


\begin{gathered} 36=4a \\ a=(36)/(4) \\ =9 \end{gathered}

The formula for the area of square is,


A=a^2

Substitute the value of a in the formula to obtain the area of square.


\begin{gathered} A=(9)^2 \\ =81 \end{gathered}

So area of square is 81 square inches.

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