Geometry

Question Analysis：
This question focuses on determining the appropriate triangle - congruence criterion based on the given angle and side information in the overlapping triangles and .

Key Concept Explanation：
- SAS (Side - Angle - Side): If two sides and the included angle of one triangle are equal to two sides and the included angle of another triangle, the triangles are congruent.
- SSS (Side - Side - Side): Requires all three sides of one triangle to be equal to the three sides of another triangle.
- ASA (Angle - Side - Angle): Demands two angles and the included side to be equal.
- AAS (Angle - Angle - Side): Involves two angles and a non - included side being equal.

Step - by - Step Solution：
Given that

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