Answer:
[tex]\sqrt{80}[/tex]
Step-by-step explanation:
Pythagorean theorem (Gougu theorem) states that the hypotenuse squared is equal to the sum of the squares of two other sides. (a^2 = b^2 + c^2). Hence x^2 = 4^2 + 8^2 = 80.
As x squared is 80, x is the square root of 80.
You can factorise this into 4[tex]\sqrt{5}[/tex]
