I do not understand this math problem. I do not know the answer. Please help.

For each figure below, determine (by using the markings) if there is a pair of congruent triangles. If there is, name the congruence and give the property justifying the congruence. Note that the pairs of triangles are drawn as congruent, but you should not rely on how they are drawn in determining your answers. If necessary, you may learn what the markings on a figure indicate. (a) H ONot Necessarily Congruent O Congruent: A GHI = _ by the K (Choose one) (b) X U Not Necessarily Congruent O Congruent: Explanation Check