Question 1079430


if a rectangle has {{{W=2.8cm}}} and  {{{d=5.3cm}}}, and we know that diagonal divides rectangle into two right angle triangles, use Pythagorean theorem to calculate the lenght of the rectangle {{{L}}}

{{{d^2=L^2+W^2}}}

{{{L^2=d^2-W^2}}}

{{{L=sqrt(d^2-W^2)}}}....substitute given values for {{{d}}} and {{{W}}}

{{{L=sqrt((5.3cm)^2-(2.8cm)^2)}}}

{{{L=sqrt(28.09cm^2-7.84cm^2)}}}

{{{L=sqrt(20.25cm^2)}}}

{{{L=4.5cm}}}