ASA for the first one because there are 2 markings for (A)ngles so the only one is ASA
SSS for the second one because there are 2 markings for (S)ides and the 3rd one is the one the share (they don't put a marking because you should know that)
ASA for the third one because you see that there is one marking of a (A)ngle and one marking or a (S)ide and like the second one they did not mark the angle they share in the middle.
