We see 2 congruent angles (A and B) that adjacent to the side AB,
this is Angle- Side-Angle Theorem. (A)
For right triangle it can be called Leg-Angle theorem. (F)
It could be Side- Angle- Side theorem, because AB=XY, BC=YZ, angle B=angle Y, but for right triangle it names Leg-Leg theorem. (B)