Question 731830
The shape is a square so length and width are the same size.
d for the diagonal length, d=38.

{{{x^2+x^2=d^2}}}

{{{2x^2=d^2}}}

{{{2x^2=38^2}}}

{{{x^2=(38/2)(38)}}}

{{{x^2=19*38}}}

{{{x^2=2*19*19}}}

{{{highlight(x=19*sqrt(2))}}}


"the following,..." for choices of answers was not shown.  They must include {{{19sqrt(2)}}}, which is the
choice needing to be picked.