Square:

a)
b)
c)
d)
Area's:
a) 36cm^2
b) 49cm^2
c) 16cm^2
d) 121cm^2
side length:
a) 6
b) ?
c) ?
d) ?

b) The side length of the square with an area of 49cm^2 would be 7cm.

c) The side length of the square with an area of 16cm^2 would be 4cm.
d) The side length of the square with an area of 121cm^2 would be 11cm.