Answer:1/12
Step-by-step explanation:
Step-by-step explanation:

Answer:
10 m
Step-by-step explanation:
A square has all equal side lengths. If that is the case, the we have 4 sides that equal each other:
x + x + x + x = 40 m
4x = 40m
x = 10m
So each side is 10 m long.
It is 0 because anything multiplied by 0 is 0.