Question 87590
Given length = 2 cm

 and  width = 3 cm

{{{ Diagonal = sqrt(length^2 + width^2)}}} (by Pythagorean Theorem)

{{{ Diagonal = sqrt(2^2 + 3^2)}}}

{{{ Diagonal = sqrt(4 + 9)}}}

{{{ Diagonal = sqrt(13)}}}


  Diagonal = 3.6