Graphing Calculator Math Worksheets Algebara Solver Chart Maker
 A+ A− B

# 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.
Worksheet & Activity on the Angle Angle Side Postulate
Example of Angle Angle Side Proof (AAS)

#### Identify Angle Angle Side relationship

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

Practice Proofs

Prove $$\triangle ABC \cong \triangle DEC$$

Prove $$\triangle ABC \cong \triangle DEF$$

## Can you identify the error in the AAS proof below?

What is wrong with the proof below?