What are the values of a and b? Thank you for helping.

Answer: [tex]\bold{a=8,\quad b=2\sqrt{17}}[/tex]
Step-by-step explanation:
First, I like to draw the triangles so they look the same.
Now, because the angles from the top triangle are congruent to the triangle on the bottom, they are similar triangles. Therefore, their sides form a proportion. From drawing I created, the sides match up as follows:
Next, set up the proportions
[tex]\dfrac{32}{a} =\dfrac{a}{2}[/tex]
[tex]=\dfrac{64}{a^2}[/tex]
[tex]= 8[/tex]
Lastly, Use the Pythagorean to solve for b:
2² + 8² = b²
4 + 64 = b
68 = b²
2√17 = b