For SAS, the criterion is as follows:
a) Lengths of any two sides.
b) The measure of the angle between these sides.
For ASA, the criterion are as follows
a) Measures of any two angles.
b) Lengths of the side between these angles.
OR
If two pairs of corresponding angles and also if the included sides are congruent, then the triangles are congruent. This criterion is known as angle-side-angle (ASA). Another criterion is angle-angle-side (AAS), where two pairs of angles and the non-included side are known to be congruent.