1. Congruent Figures Congruent Polygons have congruent corresponding parts- their matching sides and angles.

2. If two angles and one triangle are congruent to two angles of another triangle, then the third angles are congruent.

3. Side-Side-Side If the three sides of one triangle are congruent to the three sides of another triangle, then the two triangles are congruent.

4. Side-Angle-Side If two sides and the included angle of one triangle are congruent to two sides and the included angle of another triangle, then the two triangles are congruent.

5. Angle-Side-Angle If two angles and the included side of one triangle are congruent to two angles and the included side of another triangle, then the two triangles are congruent

6. Angle-Angle-Side If two angles and a non included side of one triangle are congruent to two angles and the corresponding nonincluded side of another triangle, then the triangles are congruent.