Question 814576
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
the length of a rectangle is 4 meters and its area is 12 square meters 
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A = {{{l*w}}}
 A = {{{4m*w = 12m^2}}} , w = 3m
Diagonal  = {{{sqrt(4^2 + 3^3) = highlight( 5m)}}}