The pythagorean theorem is expressed as
hypotenuse^2 = one leg^2 + other leg^2
From the diagram,
hypotenuse = x
one leg = 40
other leg = 9
Thus, we have
[tex]\begin{gathered} x^2=40^2+9^2 \\ x^2\text{ = 1600 + 81 = 1681} \\ x\text{ = }\sqrt[]{1681} \\ x\text{ = 41} \end{gathered}[/tex]The correct option is B
