SOLUTION
Given the question in the image, the following are the solution steps to answer the question.
STEP 1: Write the given measures
[tex]\begin{gathered} Area=64m^2 \\ side=8m \end{gathered}[/tex]
STEP 2: Write the formula for area of a square
[tex]\begin{gathered} Area=length\times width \\ since\text{ length and width are equal, therefore,} \\ Area=length^2 \end{gathered}[/tex]
STEP 3: Find the missing length (t)
[tex]\begin{gathered} Area=t\times8 \\ 64m^2=8t \\ Divide\text{ both sides by 8} \\ t=\frac{64m^2}{8m}=8m \end{gathered}[/tex]
Hence, the missing length is 8m
