Question 1195290

the area of a square is {{{ 36ft^2}}} 

side of a square is {{{a}}}

then

{{{a^2= 36ft^2}}} 

{{{a= 6ft}}} 


the length of its diagonal:

{{{d^2=a^2+a^2}}}

{{{d^2=2a^2}}}

{{{d^2=2(6ft)^2}}}

{{{d=6sqrt(2)ft }}}

{{{d=6sqrt(2)ft }}} exactly

{{{d=8.5ft}}} approximately