namely

1, three groups of congruences of two equilateral triangles (SSS for short).

2. Two triangles with two sides and their included angles correspond to each other.

3. The consistency of two triangles with two angles and their clamping edges (ASA)

Note: S is the abbreviation of edge and A is the abbreviation of angle.

Push from 3 o'clock

4. The opposite side with two angles and one angle corresponds to the congruence (AAS) of two triangles.

5. The congruence conditions of right-angled triangles are as follows: the hypotenuse and right-angled side correspond to the congruence of two right-angled triangles.