The two triangles are obviously congruent.
If you were to turn the 2nd triangle up-side-down, you would see that both of the triangles are the same.
Additionally, each side of each triangle that has the 1 line going through it tells us that those two lines are the same.
And each side of each triangle that has the 2 lines going through it tells us that those 2 lines are also the same. At this point, it's good to infer that the 3rd line from each triangle that doesn't have a line going through it is also the same.
