Answer:
4√2 units.
Step-by-step explanation:
The painting is in the form of a Square.
Area of the painting = 2 ft²
For a square of side length, l
![\begin{gathered} \text{Area}=l^2 \\ l^2=2 \\ l=\sqrt[]{2}\text{ units} \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/ijjlz4jy63sff1xd3er8ohm1kdsjbvmsou.png)
Since we have found the length, we can then determine its perimeter.
![\text{Perimeter of a square=4}l^{}](https://img.qammunity.org/2023/formulas/mathematics/college/9tp2cmtglqz5vdcm70cmw22fx5j0mqatu4.png)
Substituting the value of l derived above:
![\text{Perimeter}=4\sqrt[]{2}\text{ units}](https://img.qammunity.org/2023/formulas/mathematics/college/r0bs2k9hu8s5qivmplncvpwd6pcbjxis1b.png)
The exact perimeter is 4√2 units.