Question

plz help I don't understand it

Answer 1

Hello, Just do 16 because it's the total of the square and devide it by 4 because of the four sides then you get 4. Each side is 4.

16•-•4=4

Answer 2

p=s+s+s+s

so you can divide 16 in to 4 

and you get 4 

so a=4