ANSWER
The perimeter is
[tex] \frac{20}{7} \: units[/tex]
or
[tex]2 \frac{6}{7} \: units[/tex]
EXPLANATION
The perimeter of a plane figure is the distance around the figure.
The perimeter of a square is given by the formula,
[tex]p = 4l[/tex]
Where
[tex]l = \frac{5}{7} [/tex]
is the length of one side of the square.
We therefore substitute this value into the equation to obtain,
[tex]p = 4 \times \frac{5}{7} [/tex]
This will simplify to
[tex] p = \frac{20}{7} units[/tex]
or
[tex]2 \frac{6}{7} \: units[/tex]
