1.
We know that the side of a square is a (a = 2 cm) and we must calculate the perimeter.
To find the permeter of a square we must use the next formula
![p=a+a+a+a=4a](https://img.qammunity.org/2023/formulas/mathematics/college/fvpfijgkpkgsi6ryfgu0iulldpzoefe5kd.png)
Now, replacing a = 2 cm in the formula
![p=4(2\operatorname{cm})=8\operatorname{cm}]()
The perimeter of the square is 8 cm.
2. Yes, they are.
In the formula for the perimeter of a square we can see that the perimeter is always the length of its side four times. So, when the length grows the perimeter does to. This is definitely a directly proportional relationship between Side length and Perimeter.