You can only prepare the plane geometry questions for the second exam now (the second exam has ***3 questions, and the plane geometry has 1). At the level of junior high school, you can only master and apply those theorems (Mellaus theorem, Leibniz theorem, etc.). ) The more skilled the better, and you can only do more exercises. There is no better way. You see and do more.

In addition, the plane geometry problem in Test 2 may be beyond the scope of plane geometry and may involve the knowledge of "graph theory" in universities. If you can accept it, I suggest you learn relevant knowledge.

Finally, I advise you not to spend too much energy preparing for the second exam of senior high school league in grade three. There are two problems:

First, the most direct thing is to get into a good high school. If the results of the senior high school entrance examination are not satisfactory, it will be hard to say the high school league, because now China still values which famous school you came from, and a good high school is the first step to enter a good university (don't expect that small number of walks, pay attention to that only some schools are qualified to vote for students).

Second, the high school mathematics league contains 1 test and 2 tests, both of which are 150, but the gold content of the two tests is obviously higher than that of 1 test, but the final score is not gold content, that is to say, there is no difference between the 50 points of 1 test and the 50 points of 2 tests, but the 50 points of 2 tests. So the attempt of 1 is very important. Try 1 to get more than 120, and do your best (100 is good), so the result will be ideal. However, the content in the 1 exam is not something you can prepare in the third grade, so it is more practical to talk about it in high school.