congruence tests for triangles

• tests that determine whether triangles are congruent,
that is, exactly the same.
SSS: three pairs of corresponding sides equal,
SAS: two pairs of corresponding sides and included angle equal,
AAS: two angles and one corresponding side equal,
RHS: the hypotenuse and one corresponding side of right‐angled triangles.

EXAMPLES:

interactive demonstrations
http://www.mathopenref.com/congruentsss.html