Whats the answer? A, B, C, or D??

Answer:
D
Step-by-step explanation:
This triangle is a 45-45-90 triangle, which is a special triangle! Ooh! That means we already know that the ratio of its sides is [tex]x\sqrt{2}[/tex], x, and x, with the legs = x and the hypotenuse = [tex]x\sqrt{2}[/tex].
We have the hypotenuse as 8, so plug it in:
8 = [tex]x\sqrt{2}[/tex]
8/[tex]\sqrt{2\\}[/tex] = x
Multiply both the top and bottom of that fraction by [tex]\sqrt{2\\}[/tex] to get
8[tex]\sqrt{2\\}[/tex] / [tex]\sqrt{2\\}[/tex][tex]\sqrt{2\\}[/tex] =
8[tex]\sqrt{2\\}[/tex] / 2 = 4[tex]\sqrt{2\\}[/tex]
x = 4[tex]\sqrt{2\\}[/tex], so v and u = 4[tex]\sqrt{2\\}[/tex]!