find the third slide in simplest radical form. please tell me the formula i need to use to figure this problem out

find the third slide in simplest radical form please tell me the formula i need to use to figure this problem out class=

Respuesta :

Answer:

3.

Step-by-step explanation:

By Pythagoras:

5^2 = 4^2 + x^2

x^2 = 26 - 16 = 9

x = 3.