Question

How can you tell if it's a SAS (side angle side) or SSS (side side side) or ASA (angle side angle)?

Answer 1

The SSS rule states that :

If three sides of one triangle are equal to three sides of another triangle, then the triangles are congruent.

The SAS rule states that :

If two sides and the included angle of one triangle are equal to two sides and included angle of another triangle, then the triangles are congruent.

The ASA rule states that :

If two angles and the included side of one triangle are equal to two angles and included side of another triangle, then the triangles are congruent.

Hope this helps :)