Question

Pls help, I've been stuck on this for a while

Answer 1

2√(5)

Explanation:

Since it's stated that thegiven is right triangle :

The square length of hypotenus (the side lenght that sees 90 degrees) is equal to sum of square length of side lengths

2^2 + 4^2 = x^2

4 + 16 = x^2

20 = x^2 and x = 2√(5)