Geometry

Question Analysis:
This higher-order question examines deep understanding of SAS requirements in proof-writing contexts.

Key Concept Explanation:
In SAS proofs, the equal angles must be included between the specified sides (AB & BC, XY & YZ in this case).

Step-by-Step Solution:
Given Proof Elements:
AB = XY (Side)
BC = YZ (Side)
∠B = ∠Y (Angle)
SAS Validation:
The angle must be between AB & BC and XY & YZ.
Conclusion:
Option (B) states the critical requirement.

Option Analysis:
(A) Incorrect → SAS works for any angle type.
(B) Correct → Matches SAS definition.
(C) Incorrect → Angle size is irrel...