SAS？ Are the two sides of two triangles equal? If the angles between the two sides are equal, then the two triangles are congruent.
AAS？ Are the two angles of two triangles equal? Isn't one side of the clip equal? Then two triangles are congruent.
Asa? Are the two angles of two triangles equal? Are the two angles equal? Then two triangles are congruent.
HL Two right-angled triangles have equal hypotenuses and one right-angled side is equal. So what? Two triangles are congruent.