Congruency

-When two triangles are congruent,each pair of corresponding angles and each pair of corresponding sides are equal.(Abbreviation: corr. part of )

-If three pairs of corresponding sides of two triangles are equal, then the two triangles are congruent.This is also known as the Side-Side-Side test.(Abbreviation:SSS)

-If two sides and the included angle of one triangle are equal to the corresponding parts of another triangle, then the two triangles are congruent. This is also known as the Side-Angle-Side test.(Abbreviation: SAS)

-If two angles and the included side of one triangle are equal to the corresponding parts of another triangle, then the two triangles are congruent.This is also known as the Angle-Side-Angle test.(Abbreviation:ASA)

-If the hypotenuse and one sie of a right angled triangle are equal to the corresponding parts of another right angled triangle, then both triangles are congruent.This is also known as the Right Angle-Hypotenuse-Side test.(Abbreviation:RHS)