Respuesta :

Answer: x = 41

Step-by-step explanation:

The side of the hypothenuse will be gotten when we add the square of the other two lengths and then find the square root. Thus will be:

x² = ✓(40² + 9²)

x² = ✓1600 + 81

x² = ✓1681

x = 41

It forms a Pythagoras triple