Following are the rules by which we can prove that two triangles are congruent:
SSS (SideSideSide) rule of Congruence
SAS (SideAngleSide) rule of Congruence
ASA (AngleSideAngle) rule of Congruence
RHS (Right AngleHypotenuseSide) rule of Congruence
(Study these rules in detail with examples and diagrams from above respective links)
