Congruent polygons are those that have equal measurements. Since we are given their graphs, we simply inspect each pair of polygons to determine which among them are congruent.
I have made an example using the first pair. I rotated the first polygon (the red one) to show that they are indeed congruent.
Following the same process, we can see that pairs 3 and 4 are also congruent.
Pair 2 are not congruent because the green rectangleis longer.
So the answer is pairs 1, 3, and 4.
