How does autumn volunteer rate compared to the challenge rate?

Lena reflected this figure across the x-axis. she writes the vertices of the image as a'(−2, 8), b'(−5, 6), c'(−8, 8), d'(−4, 2).

Find the domain of the following expression: 1/(√x)-2

Are the corresponding angles congruent? explain why or why not.