Question 143528
{{{A=L*W}}} Start with the area formula



{{{A=sqrt(2)*sqrt(40)}}} Plug in {{{L=sqrt(2)}}} and {{{sqrt(40)}}}



{{{A=sqrt(2*40)}}} Combine the square roots



{{{A=sqrt(80)}}} Multiply




{{{A=sqrt(16*5)}}} Factor 80 into 16*5
 


{{{A=sqrt(16)*sqrt(5)}}} Break up the square root
 


{{{A=4*sqrt(5)}}}




So the area is {{{A=4*sqrt(5)}}}