Respuesta :

altavistard
One triangle has a hypotenuse of 8 and a leg of 3 (units).  What is the length of the 2nd leg?  Use the Pyth. Theorem:

8^2 = 3^2 + x^2, so that 64-9 = x^2, and x = sqrt(55).

Do the next problem in exactly the same way:  x = sqrt(5^2-3^2).