Congruency rules

• If their sides are all the same length then the triangles are congruent. (S.S.S)
• If 2 of their sides are the same length and their included angles are the same then the triangles are congruent. (S.A.S)
• If 2 of their angles are the same and 1 set of corresponding sides are the same then the triangles are congruent. (A.A.S)
• If they both have right angles, they have the same hypotenuse and one other side is the same length then the triangles are congruent. (R.H.S)