Answer:
For the first 3 questions, fill out exactly what you see in the picture. So, the first answer is [tex]9\sqrt{2}[/tex], the second one is x, and the third one is y. Now, since we know this is a 45 - 45 - 90 triangle, we can figure out all of the other sides. AB is the same as AC, so your answer for the fourth one question will be [tex]9\sqrt{2}[/tex]. The hypotenuse in a 45 - 45 - 90 triangle is a side times [tex]\sqrt{2}[/tex], so your last answer will be [tex](9\sqrt{2})(\sqrt{2}) = 18[/tex].
