How do I know if two shapes are congruent?

In order to determine if two shapes are congruent, we can use a series of congruence tests. These tests include the Side-Angle-Side (SAS), Angle-Side-Angle (ASA), Side-Side-Side (SSS), and Angle-Angle-Side (AAS) tests. By comparing the corresponding sides and angles of the two shapes, we can ascertain if they are congruent. For example, if the corresponding sides of two triangles are of equal length and the corresponding angles are equal in measure, the triangles are congruent. Utilizing these tests allows us to effectively identify congruent shapes and deepen our understanding of geometric concepts.