Triangles which are exactly the same shape **and **size are **congruent**.

Note: this also applies to shapes other than triangles.

Triangles are congruent for the following reasons:

**Three matching sides (SSS)**

**Two matching sides and the angle between them (SAS)**

**Two matching angles and a corresponding side (AAS)**

**In a right-angled triangle, the hypotenuse and one matching side (RHS)**

Now it's over to you. You will identify congruent triangles and give reasons as to why they are in fact, congruent.