Angle Angle Side Postulate

Proving Congruent Triangles with AAS

The Angle Angle Side postulate (often abbreviated as AAS) states that if two angles and the non-included side one triangle are congruent to two angles and the non-included angle of another triangle, then these two triangles are congruent.

Worksheets & Activities on Triangle Proofs | Angle Angle Side problem proof(Can you find the error)

Example of Angle Angle Side Proof (AAS)

Two angles and a non-included side are congruent
- CAB = ZXY (angle)
- ACB = XZY (angle)
- AB = XY (side)
Therefore, by the Angle Angle Side postulate (AAS), the triangles are congruent.

Identify Angle Angle Side relationship

Identify which pair of triangles below does NOT illustrate an angle angle side (AAS) relationship.
Answer
Identify Angle Angle Side relationship (AAS)

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