The diagonal is the hypotenuse of a right triangle so the diagonal would be the result of using the Pythagorean theorem
c^2 = 9^2 + 40^2
c^2 = 81 + 1600
c^2 = 1681
c = 41 inches
So the diagonal (hypotenuse) of a 9 in x 40 in rectangle is 41 inches (remember a rectangle has right angles like a square does, the only difference between a rectangle and a square is that the length and height of the square are the same, whereas the length and height of a rectangle are different)
Apr 13th, 2015
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