Respuesta :

Kaikerscupcake
a^2+b^2=c^2

9^+40^2= c^2

Square the numbers.

81+1600=c^2

1681=c^2

Find the square root. 

c=41

The length of the hypotenuse is 41. 

I hope this helps!
~kaikers
hawk93977
          I
9cm   I
          I------------------------------
                        40cm
      a^2+b^2=c^2
      9^2+40^2=c^2
       81+160^2=c^2
          sq root of =241
          c^2=15.5241.............  is the answer
 mark me as brainliest