I never understood it and always found it so boring, the worst subject for me. I just got a bad grade in math today on a test, it sucks, I will get the belt tomorow for it.
If it is about finding which side is equal to which, which angle is equal to which, and declaring two triangles are identical as two sides and the angle formed by them ate the same in both cases, we call this congruence, or congruent triangles.
Those involved identical triangles? Or mid point theorem? For me, the most difficult part is to spend sufficient time to thoroughly understand each example. (usually the result of insufficient patience)
Do you think the Math textbook (geometry part) difficult to read? Also, what is the topic that you are studying? Congruence and similarities? Cyclic quad.?