It’s a proof... but I don’t think it’s that hard! *sorry I’m just dumb so please do this proof for me...*

Answer:
1. given
2. bisected angles create two congruent angles
3. same side length
4. ASA: angle, side, angle congruency
5. the two triangles are congruent, meaning all of their side lengths correspond, meaning that YZ and WZ are equivalent.