Answer:
We can use the SAS. (B)
Explanation:
- The triangles have a side in common (XZ): SIDE (S)
- Also, the triangles XWZ and XYZ have a right angle in the vertex Z: ANGLE (A)
- Lastly, the sides WZ and ZY have the same lenght, since they're marked with the same signal: SIDE (S)
So, the postulate SAS (side-angle-side) can be directly used to determine that XWZ and XYZ are congruents. Hence, the answer is the alternative B.