Solution:
We aim to prove that,
△ABC is similar to △Z Y X by SAS.
Given that, ∠X is congruent to ∠C.
It's crucial to keep in mind that two triangles are considered similar using SAS if
1. The sides included between the angles must be in proportion.

2. Now, we must verify that,
△ABC is similar to △Z Y X following SAS criteria.
It is given that, ∠B coincides with ∠Y.
The side between the specified angles must also be proportional.

3. Next, we'll establish that,
△ABC is similar to △Z Y X according to the SSS principle.
All three sides of the two triangles should be proportional.
