Question

I don't remember how to do this problem. Please help. Show work too, thank you c:

Answer 1

because it is a 45-45-90 triangle
y = 4
a^2 + b^2 = c^2
4^2 + 4^2 = c^2
16 + 16 = c^2
32 = c^2

c = 4sqrt.(2)

Hope this helps!

Answer 2

the third one should be it as far as i know