Question 1207593


given:

{{{w=2.8cm}}}
{{{d=5.3cm}}}

 the length {{{l}}},  the width {{{w}}}, and one diagonal {{{d}}} of the rectangle form right triangle

so, 

{{{l^2=d^2-w^2}}}

{{{l^2=(5.3cm)^2-(2.8cm)^2}}}

{{{l^2=28.1cm^2-7.8cm^2}}}

{{{l^2=20.3cm^2 }}}

{{{l=sqrt(20.3cm^2) }}}

{{{l=4.506cm }}}