Question 784040

the area of a square is {{{A=a^2}}} where {{{a}}} is the side

 if the length of each side is {{{9yd}}}, then  {{{A=a^2}}} will be:

 {{{A=(9yd)^2}}} 

{{{A=9^2yd^2}}} 

{{{A=81yd^2}}}