First of all, SSS, SAS and ASA are NOT postulates.
SSS is a proved theorem. SAS and ASA are usually considered theorems...but admittedly there is some disagreement about that.
In the first figure, the diagonal is clearly common to both triangles; the unmarked opposite sides need to have equal length.
In the 2nd figure the measure of angle J needs to be equal to the measure of angle A.
In the 3rd figure, the angles at X have equal measure because they are vertical angles and the measure of angle W needs to be equal to the ,measure of angle Y,
